Aerospace GR4 Titanium Foil Aerospace Gr4 Titanium Foil is a high-strength titanium foil made from Grade 4 commercially pure titanium, produced to aerospace standards such as AMS 4901. It offers the highest strength among commercially pure titanium grades, while still maintaining good corrosion resistance and a stable α-phase structure without heat treatment. This ensures reliable performance in long-term use under stress, vibration, and harsh aerospace environments. Vacuum melting and precision rolling with strict control of O, N, and H elements provide consistent quality and stable properties. https://www.titaniumvalleys.com/product/aerospace-gr4-titanium-foil/