Project Background
A customer in the aerospace sector required lightweight, high-strength structural components for propulsion system assemblies. The parts were designed to operate under demanding mechanical conditions, where weight reduction, dimensional accuracy and material reliability were all critical.
Titanium alloy was selected because of its excellent strength-to-weight ratio, corrosion resistance and proven performance in aerospace environments. However, the customer’s component geometry included thin-wall sections, complex internal features and tight tolerance areas, which created significant challenges during machining.
The project required not only precision CNC machining capability, but also a practical understanding of titanium behavior, deformation control and inspection planning.
Engineering Challenge
Titanium aerospace components are difficult to machine because the material has low thermal conductivity and relatively high strength. During cutting, heat tends to concentrate near the cutting edge, which can accelerate tool wear and affect surface quality.
For this project, the main engineering challenges included maintaining dimensional stability across thin-wall structures, controlling deformation after material removal, and achieving consistent tolerances on key assembly interfaces.
The component also required careful machining sequence planning. If too much material was removed too quickly, internal stress could be released unevenly, leading to distortion before final inspection. In addition, several functional surfaces required stable surface finish and accurate positioning to ensure reliable assembly performance.
Another challenge was quality documentation. For aerospace-related applications, customers often require clear inspection records, material traceability and process discipline. The machining process therefore had to be supported by a reliable quality control plan from raw material review to final inspection.
Nova’s Solution
Nova Special Metals supported the project with a process-focused machining approach. Before production, the drawing and material requirements were reviewed to identify high-risk areas, including thin-wall sections, tolerance-critical surfaces and potential distortion zones.
A staged machining strategy was adopted to reduce stress concentration during material removal. Rough machining was used to remove bulk material in a controlled way, while semi-finishing and finishing operations were separated to improve dimensional stability. For thin-wall features, additional attention was given to clamping method, tool path direction and cutting parameter control.
Tooling selection was also optimized for titanium machining. Sharp cutting tools, stable tool holders and suitable cutting parameters were used to reduce heat buildup and minimize tool wear. The machining process was designed to avoid excessive cutting force, especially near thin sections and critical edges.
Where necessary, intermediate inspection was included before final finishing. This allowed the team to monitor dimensional changes during the machining process and adjust the final operation if required. Critical features were inspected using precision measurement tools according to the customer’s drawing requirements.
Nova also emphasized documentation and communication throughout the project. Material information, machining risks, inspection points and production status were clearly managed, helping the customer understand both the manufacturing process and the quality control approach.
Achievement
Through optimized machining strategy and controlled process execution, the titanium structural components were manufactured with stable dimensional accuracy and improved deformation control.
Key results included:
- Improved machining stability for thin-wall titanium structures
- Reduced risk of distortion during material removal
- Consistent control of tolerance-critical assembly surfaces
- Reliable surface quality on functional areas
- Clear inspection support for customer quality review
The project demonstrated Nova’s ability to support complex titanium machining programs where both material knowledge and manufacturing discipline are required.
Related Capability
Nova Special Metals provides precision machining support for titanium and other high-performance alloys used in aerospace, semiconductor, medical, energy and advanced industrial applications.
For projects involving lightweight structures, thin-wall components, tight tolerances or difficult-to-machine materials, Nova can assist with DFM review, machining strategy, process planning and quality control support.
