Titanium Alloy Disc Springs & Belleville Washers

Lightweight. Corrosion-Resistant. Precision-Engineered for Critical Applications.

Titanium alloys represent one of the most technically advanced materials available for disc spring and Belleville washer manufacturing. With a density of approximately 4.43 g/cm³ — roughly 45% less than that of spring steel — titanium enables engineers to achieve the same load-bearing performance as steel springs while delivering weight savings of 60–70%. This combination of low density, high specific strength, and outstanding corrosion resistance makes titanium disc springs the preferred choice for aerospace, medical, marine, and weight-critical industrial applications.

At Christian Bauer North America, we manufacture custom titanium Belleville washers and disc spring assemblies to exact customer specifications, leveraging the same precision manufacturing processes and quality management systems that underpin our entire disc spring portfolio. Every titanium component is engineered with the correct alloy grade, geometry, and surface treatment to ensure reliable, long-term performance.

Why Choose Titanium for Disc Springs?

The selection of titanium as a spring material is driven by a unique set of engineering advantages that no other single material class can replicate. Key performance benefits include:

• Exceptional Strength-to-Weight Ratio: Titanium alloys such as Ti-6Al-4V (Grade 5) deliver tensile strengths approaching 900 MPa at less than half the density of steel, enabling dramatic mass reduction without compromising load capacity.
• Outstanding Corrosion Resistance: Titanium naturally forms a stable titanium dioxide (TiO₂) oxide layer on its surface, providing excellent resistance to seawater, salt spray, dilute acids, and a wide range of industrial chemicals — making it ideal for marine, offshore, and chemical processing environments.
• High Specific Modulus: With an elastic modulus of approximately 114 GPa (compared to ~200 GPa for spring steel), titanium is approximately twice as “springy” as steel by weight. This means a titanium spring can be designed with a larger wire diameter and fewer coils to match the performance of a steel equivalent — resulting in a smaller, lighter component.
• Broad Operating Temperature Range: Titanium alloys maintain their structural integrity and spring characteristics across a wide temperature range, from cryogenic conditions as low as -270°C up to approximately 315°C for continuous service use in standard alloys, making them suitable for both cryogenic and moderately elevated-temperature environments.
• Biocompatibility: Commercially pure and alloy grades such as Ti-6Al-4V ELI (Grade 23) are non-toxic and biocompatible, meeting the requirements of medical device and implant applications.
• Non-Magnetic Properties: Titanium is non-magnetic, making titanium disc springs appropriate for sensitive instrumentation, MRI-adjacent equipment, and defense electronics assemblies where magnetic interference must be eliminated.

Titanium Alloy Grades for Disc Spring Applications

Not all titanium alloys perform equally in spring applications. Christian Bauer North America works with engineers to select the most appropriate grade based on load requirements, operating environment, weight budget, and service conditions.

Grade 2 — Commercially Pure Titanium (CP-Ti)

Grade 2 is the most widely used commercially pure titanium grade, often referred to as the “workhorse” of titanium. While lower in strength than alloyed grades, its excellent corrosion resistance, good formability, and consistent mechanical behavior make it well-suited for disc springs used in chemical processing, marine hardware, and general industrial environments where weight and corrosion resistance are more critical than peak load capacity.

• Tensile Strength: ~345 MPa (minimum)
• Density: 4.51 g/cm³
• Corrosion Resistance: Excellent
• Weldability: Excellent
• Typical Applications: Marine components, chemical processing equipment, general industrial springs

Grade 5 — Ti-6Al-4V (The Most Widely Used Titanium Alloy)

Ti-6Al-4V, commonly designated Grade 5, is the most extensively specified titanium alloy in the world, accounting for more than 50% of all titanium alloy production. It combines high strength, low density, good corrosion resistance, and excellent weldability in a single material, making it the primary engineering choice for high-performance disc springs and Belleville washer applications. It is the standard alloy for aerospace, defense, and high-performance industrial spring components.

• Tensile Strength: Up to ~900 MPa
• Density: 4.43 g/cm³
• Elastic Modulus: ~114 GPa
• Corrosion Resistance: Very Good
• Operating Temperature: Up to ~315°C continuous
• Typical Applications: Aerospace assemblies, defense systems, motorsport, medical devices, offshore energy

Grade 9 — Ti-3Al-2.5V

Grade 9 contains 3.0% aluminum and 2.5% vanadium, offering a practical balance between the ease of manufacturing of commercially pure grades and the elevated strength of Grade 5. It is commonly used in aerospace hydraulic tubing, sporting goods, and spring applications where a good combination of strength, formability, and corrosion resistance is required at a moderate alloy cost.

• Tensile Strength: ~620 MPa (minimum)
• Density: 4.48 g/cm³
• Corrosion Resistance: Very Good
• Weldability: Good
• Typical Applications: Aerospace hydraulic systems, athletic equipment, precision spring components

Grade 23 — Ti-6Al-4V ELI (Extra Low Interstitial)

Grade 23 is a refined version of Ti-6Al-4V with lower levels of oxygen, nitrogen, carbon, and iron (extra low interstitials). This results in improved fracture toughness and ductility compared to standard Grade 5, while retaining strong corrosion resistance. It is the preferred grade for medical device applications, surgical instruments, and any application demanding the highest levels of material purity and biocompatibility.

• Tensile Strength: ~860 MPa
• Density: 4.43 g/cm³
• Fracture Toughness: Superior to Grade 5
• Biocompatibility: Fully biocompatible
• Typical Applications: Medical implants, surgical instruments, precision aerospace components

Titanium Alloy Material Properties at a Glance

Key Design Considerations for Titanium Disc Springs

Designing titanium Belleville washers requires specific engineering knowledge that goes beyond simply substituting steel geometry for titanium. Because titanium’s elastic modulus is approximately 43% lower than that of steel, a direct material substitution using identical dimensions will not produce an equivalent load-deflection curve. Christian Bauer North America’s engineering team reviews each titanium spring project individually to ensure optimal performance and reliability.

Critical design parameters reviewed for every titanium disc spring project include:

• Load-Deflection Curve: Geometry must be recalculated from the target load curve and installation envelope — not copied directly from a steel drawing. The reduced modulus of titanium means spring dimensions will differ significantly from a steel equivalent at the same force requirements.
• Fatigue Margin: Fatigue life analysis is essential, particularly for dynamic or cyclically loaded applications. Surface finish quality and working stress levels must be rigorously controlled to maximize fatigue performance.
• Galling and Contact Behavior: Titanium has a natural tendency to gall under sliding contact conditions. For stacked disc spring columns, appropriate surface treatments, lubricants, or coatings must be specified to prevent fretting and galling between mating surfaces.
• Heat Treatment: Specific aging and heat treatment cycles are required to achieve target mechanical properties, particularly for beta titanium alloys. Our engineering team manages heat treatment qualification as part of the development process.
• Installation Height and Stack Configuration: Due to titanium’s different spring behavior, stack configurations in series, parallel, or combined arrangements must be re-evaluated from first principles when transitioning from steel.

Industries and Applications

Christian Bauer North America supplies titanium disc springs and Belleville washers across a broad range of industries where the material’s unique combination of properties provides a clear engineering advantage over steel or stainless steel alternatives:

• Aerospace & Defense: Lightweight preload assemblies, actuator components, structural fastener systems, landing gear mechanisms, and flight control systems where every gram of mass reduction has a direct impact on performance and fuel efficiency.
• Medical Devices: Surgical instruments, orthopedic implant assemblies, and precision medical equipment requiring fully biocompatible, corrosion-resistant spring elements with traceable material certification.
• Marine & Offshore: Subsea equipment, offshore drilling assemblies, ship propulsion systems, and saltwater-exposed hardware where titanium’s immunity to chloride-induced corrosion provides a decisive service life advantage over stainless steel.
• Motorsport & High-Performance Automotive: Suspension and valve train spring applications where reducing unsprung mass or reciprocating weight delivers measurable performance gains.
• Chemical & Industrial Processing: Valve actuation systems, pressure control assemblies, and process equipment operating in corrosive chemical environments where steel alloys would be subject to accelerated degradation.
• Precision Instrumentation: Non-magnetic spring elements for sensitive scientific, defense, and measurement instruments where magnetic interference must be completely eliminated.
• Energy & Power Generation: Weight-sensitive assemblies in renewable energy systems, turbine components, and hydrogen technology infrastructure where both corrosion resistance and material certification are required.

Christian Bauer North America’s Titanium Disc Spring Capabilities

As a global leader in precision disc spring engineering, Christian Bauer North America applies decades of application engineering expertise and state-of-the-art manufacturing capabilities to every titanium spring project. Our titanium disc spring services include:

• Custom Engineering & Alloy Selection: Our application engineers work directly with your team to select the correct titanium grade, define the target load-deflection curve, and develop a geometry optimized for your installation envelope and service conditions.
• Prototyping & Validation: From initial concept through prototype validation and fatigue testing, we support your development program at every stage before series production begins.
• Series Production to Tight Tolerances: All titanium disc springs are manufactured in Germany by Christian Bauer GmbH to micrometer-level dimensional tolerances, with full material traceability and mechanical testing documentation.
• Full Material Certification: Material test reports, chemical analysis certificates, and mechanical property certifications are available for all titanium alloy spring components to support aerospace, defense, and medical supply chain requirements.
• Surface Treatment & Coatings: Where anti-galling protection or enhanced fatigue performance is required, we can specify and apply appropriate surface treatments as part of the finished component supply.
• Stacked Column Assemblies: We supply titanium disc springs as individual components or as pre-assembled column stacks in series, parallel, or combination configurations, depending on the application’s load and deflection requirements.

Ready to specify titanium disc springs for your application? Christian Bauer North America’s engineering team is ready to support your project — from material selection and load curve analysis through to full series supply. Whether you are replacing a steel spring with a lighter titanium alternative or designing a new assembly from scratch, we have the expertise and manufacturing capability to deliver.

Contact us today to discuss your titanium disc spring requirements and request a quote.

Return to Materials Overview     Request Quote