steel, aluminum, carbon & titanium all snap, bend, crumple and sheer when they are subjected to loads they're not designed to handle, such as the case with crashing.
especially when you hit another object.
True. However, Titanium is much more elastic than CF. Based on riding and crashing a Ti bike, and seeing a lot of CF bikes crashed, there is zero doubt in my mind that there are crashes where a Ti bike will spring back with little or no damage that destroy CF bikes.
Also, scrapes on Ti are much less likely to be a problem than on CF, where abrasions can be an issue.
I've never seen a Ti frame destroyed by chainsuck, I've have seen that for CF.
Nothings going to last forever. But if long term durability is the number one criteria, Ti, which doesn't rust, is springy, and not particularly prone to damage by abrasions is going to be the best bet over the long haul.
Plus, a Ti bike will keep looking good for a long time. My Merlin is 11 years old, with 40,000 miles on it, and if I would clean it would look brand new.