From what I've seen in the shop - aluminium bends then breaks, steel bends, carbon fiber breaks - all of which is pretty incidental cause the frame or fork or bars are usually scrapped regardless of material. Usually it has more to do with replacement cost vs repair cost than the choice of material.

Steel frames crack eventually, so do aluminium frames, so do carbon fiber frames. But honestly - eventually is a long time and the average consumer doesn't put enough miles on their bike to worry about any of it.