The β titanium alloy Ti-38-644 (Ti-3Al-8V-6Cr-4Mo-4Zr) has a long history as an aviation spring wire.
A large part is used in helicopters.
In the actual operation of a large number of military works, it was found that the wire used for springs is usually aged after being made into a spring.
The advantages of this operation
1) Fast spring forming
2) The overall performance of the product will be more stable and prolong the service life of the product
Practice data shows that if the spring is processed after aging, it is difficult to shape or the spring performance is lower than AMS specificaiton demand