Originally Posted by
TiHabanero
This is my experience as a shop mechanic for several decades. The replaceable Der hangers weaken over time. I don't know exactly why, but they come through often enough out of alignment for me to believe this does happen. I have not seen a titanium frame with an integrated hanger go out of alignment or break off in a mishap.
They're aluminum, of course they have a short fatigue life.