There is so much time, effort, and physical waste that is generated by slightly redesigning phones every year purely for the sake of making sales (as opposed to meaningful improvement upon the existing design or introduction of a new hardware feature). Think not only of people upgrading for the sake of it, but all of the cases, screen protectors, and other assorted accessories cast in plastic for previous models that are garbage now.
It would be nice if we could just space these things out to 5 years or so now, because that's probably how long it takes for anything to change enough to justify a new model.
The ad I keep seeing doesn't even hint at why Titanium matters. No matter, the point is, evidently the technical aspects don't seem to matter.
Titanium sounds cool, it sounds luxury, it's a marketing hack. Like <strike>"aircraft-grade"</strike> "space-grade" aluminum. Nobody is launching their aluminum phones at escape velocity. It's 100% for marketing reasons.
I have some titanium spoons, I feel into the trap too.
The previous iPhone Pro's have a stainless steel shell, not aluminum, and the ~30 gram difference is noticeable.
Of course, they caused this problem themselves by using stainless steel rather than aluminum like the regular iPhones, but they are nonetheless solving a problem with the titanium frame.