Titanium Alloys for Casting, Forging and Precision Machining

Titanium Alloys for Lightweight, Corrosion-Resistant Components

Titanium alloys combine low density, high specific strength, corrosion resistance, fatigue performance, and useful temperature capability. ForceBeyond supports titanium components across investment casting, forging, precision machining, heat treatment, surface finishing, inspection, and assembly.

This page serves as the titanium material-family guide for Ti-6Al-4V Grade 5, Ti-6Al-4V ELI Grade 23, commercially pure titanium, and application-specific grades. Final alloy and process selection should be based on product form, specification, service environment, loading, fatigue, temperature, corrosion, cleanliness, and inspection requirements.

Titanium Alloy Families and Representative Grades

Mechanical properties vary by chemistry, product form, heat treatment, section size, processing route, and test method. The table below is intended for initial material selection rather than final design allowables.

Review the broader materials and technical specifications hub for cross-family alloy selection and manufacturing compatibility.

Grade 5 vs. Grade 23 ELI vs. Commercially Pure Titanium

Selecting a Titanium Manufacturing Route

The correct route depends on geometry, volume, alloy, product form, mechanical properties, cleanliness, inspection, and tooling economics.

• Titanium investment casting: complex near-net geometry, internal features, reduced machining, and production parts where the alloy and specification permit.
• Titanium sand casting: larger or lower-volume components with process-specific surface, section, and inspection considerations.
• Titanium forging: components requiring grain flow, fatigue, impact, and structural performance.
• Billet and forged-part machining: prototypes, low volume, simple shapes, and applications requiring wrought material properties.
• Hybrid routes: casting or forging followed by heat treatment, HIP, machining, chemical milling, finishing, inspection, and assembly.

Titanium Casting and Alpha-Case Control

Molten and high-temperature titanium reacts strongly with oxygen, nitrogen, hydrogen, carbon, and many conventional refractories.

• Atmosphere control: vacuum or inert-atmosphere processing helps limit gas pickup and oxidation.
• Mold and crucible compatibility: ceramic, graphite, or other specialized systems must be selected for the alloy and process.
• Alpha-case allowance: surface reaction layers may require chemical milling, pickling, grinding, or machining removal.
• Solidification control: gating, feeding, hot tearing, shrinkage, and local section changes require process-specific review.
• Verification: alpha-case depth, chemistry, microstructure, NDT, and dimensional inspection may be required by specification.

Titanium Forging Considerations

• Temperature window: forging temperature and strain rate affect flow stress, cracking, and microstructure.
• Grain flow: die and preform design can align material flow with high-load regions.
• Surface protection: scale, contamination, lubrication, and atmosphere must be managed during heating and forging.
• Heat treatment: annealing, solution treatment, aging, or stress relief should follow the exact grade and specification.
• Inspection: ultrasonic testing, penetrant inspection, dimensional inspection, and mechanical testing may be required.

Machining Titanium Alloys

Titanium combines low thermal conductivity, chemical reactivity, springback, and strength at cutting temperatures, which can concentrate heat at the cutting edge.

• Rigid setups: control deflection, vibration, chatter, and feature position.
• Sharp cutting tools: maintain positive cutting action and avoid rubbing or excessive dwell.
• Heat management: use suitable coolant delivery, tool material, geometry, and cutting parameters.
• Low radial engagement: selected toolpaths can help reduce heat and maintain stable cutting on complex parts.
• Multi-axis machining: improve access, reduce setups, and use shorter tools on complex titanium components.

Heat Treatment and Microstructure Control

Heat treatment affects strength, ductility, fatigue, residual stress, microstructure, and dimensional stability.

• Annealing: reduce residual stress and establish a stable microstructure for subsequent machining or service.
• Solution treatment and aging: used on selected titanium alloys to develop specified strength and microstructure.
• Atmosphere control: vacuum or inert processing may be required to control oxidation and alpha-case formation.
• Distortion planning: fixturing, machining allowance, support, and final inspection should account for thermal movement.
• Verification: hardness, tensile testing, microstructure, alpha case, dimensional inspection, or customer-specific checks may be required.

Titanium Surface Finishing and Cleaning

• Pickling and chemical milling: remove scale, contamination, and alpha case under controlled conditions.
• Passivation and cleaning: support a clean oxide surface and remove processing contamination where required.
• Anodizing and coating: selected for color coding, wear, galling, electrical, or corrosion-related requirements.
• Mechanical finishing: grinding, polishing, blasting, and deburring for surface, edge, and dimensional requirements.
• Cleanliness: final cleaning, handling, packaging, and contamination control may be critical for medical, aerospace, or vacuum applications.

Material Verification, NDT and Documentation

• Material documentation: mill or material test reports, heat and lot traceability, and certificates of conformity.
• Positive material identification: XRF, OES, or project-specific chemistry verification where appropriate.
• Surface NDT: penetrant inspection for project-specific surface-discontinuity requirements.
• Volumetric NDT: ultrasonic or radiographic inspection based on product form, geometry, defect risk, and specification.
• Metallurgical testing: microstructure, alpha case, interstitial content, grain size, hardness, tensile, fatigue, or other project-specific evaluation.
• Dimensional inspection: CMM, gauges, optical systems, surface-finish checks, and first-article reporting.

Review our testing and inspection capabilities and quality assurance and certifications for additional information.

Titanium Applications by Industry

• Aerospace: brackets, fittings, fasteners, shafts, engine-adjacent hardware, airframe structures, and propulsion components.
• Space and defense: lightweight structures, housings, actuators, fasteners, UAV hardware, and corrosion-resistant components.
• Medical and healthcare: instruments, housings, fixation hardware, and implantable components only where the exact grade, process, validation, and regulatory requirements are approved.
• Oil and gas: corrosion-resistant fasteners, valves, pump components, offshore hardware, and deepwater equipment.
• Energy and power generation: heat-exchanger hardware, turbine-related components, fasteners, and corrosion-resistant equipment parts.
• Chemical and marine processing: heat exchangers, piping components, vessels, pump parts, and seawater-service hardware.