What inspection reports are recommended for titanium CNC machined parts?
What inspection reports are recommended for titanium CNC machined parts?
Recommended inspection reports for titanium CNC machined parts may include material certificates, dimensional inspection reports, CMM reports, thread inspection records, surface roughness reports, FAI reports, surface treatment verification, and batch traceability records when required. From an engineering perspective, the right inspection package depends on application risk, critical dimensions, required traceability, and whether the part is for prototype, low-volume, or production delivery under titanium machining quality control.
Report or Record | Main Purpose |
|---|---|
Material certificate | Confirms titanium grade, batch identity, and material source |
Dimensional inspection report | Verifies general dimensions and defined critical features |
CMM report | Validates complex geometry, GD&T, and key assembly features |
Thread inspection record | Confirms threaded holes, fastener interfaces, and connection features |
Surface roughness report | Checks sealing surfaces, friction areas, medical surfaces, or cosmetic requirements |
FAI report | Supports first article approval before low-volume or production release |
Surface treatment verification | Confirms passivation, anodizing, polishing, or other required post-process status |
Batch traceability record | Supports medical, aerospace, or long-term production traceability |
1. Material certification is often the first required document
For titanium parts, the material certificate is usually one of the most important quality documents because it confirms the alloy grade and batch traceability. This is especially important when the part is made from Ti-6Al-4V, ELI, or another controlled alloy used in regulated or high-performance applications.
2. Dimensional and CMM reports should match feature complexity
A standard dimensional report is suitable for ordinary feature verification, but a CMM report is more appropriate when the part includes complex geometry, GD&T, precision bores, sealing interfaces, or critical assembly datums. For higher-precision parts, this is closely related to precision machining and the control methods described in ISO-certified CMM quality assurance.
3. Thread and surface roughness records are important for functional features
If the titanium part includes threaded holes, fastening interfaces, sealing faces, or friction-critical surfaces, thread inspection and roughness verification may be recommended. These reports are especially useful when the part will be assembled directly into medical, robotic, aerospace, or industrial systems.
4. FAI is recommended when moving into repeatable supply
An FAI report is often recommended when the titanium project is transitioning from sample approval into low-volume or ongoing production. It confirms that the first released part matches drawing and process intent and helps reduce downstream risk on repeat orders.
5. Post-process verification matters when finished condition is critical
If the titanium part requires passivation, anodizing, polishing, or another finishing step, the delivered quality package should also confirm that the required post-process has been completed correctly. This is important because finished condition can affect corrosion resistance, appearance, roughness, and usability. That is why titanium projects often review key post-process techniques for titanium parts together with the inspection plan.
6. The inspection level should follow the application risk
The correct inspection package depends on the application industry, whether the part is used in medical or aerospace service, how many critical dimensions are involved, whether the part has assembly or sealing functions, whether material traceability is required, and whether the order is prototype, low-volume, or mass production. For example, projects related to medical device CNC machining usually need stronger traceability and documentation discipline than general industrial parts.
7. The best time to define required reports is during RFQ
To avoid quotation gaps or delivery delays, the required quality documents should be defined at RFQ stage rather than after production starts. This helps align the inspection plan with the real part function and supports a more complete control route based on quality control in CNC machining.
