I am not sure. I only know the temples of beta titanium frame are durable. You can bend the temple to some extent and then it will go back to its original shape. But not the whole frame are indestructible. Hope this helps.
Î²-titanium frame is also called memory glasses frames. The most advantage of such Î²-titanium frame is that the temples are unbreakable and they will remain the original shape even after you bend them hard.