Tectonic activity bends rocks all the time, even hard ones like granite. That takes a ton of heat, pressure and time. It also makes sense that in the right conditions, sheets of rock simply don’t have the room to shatter so they must bend.
Have we been able to do the same in a lab and would it have any commercial use? Bending a random bit of hard rock would be an interesting novelty, for sure.
Glass is a weird one since it’s an amorphous solid.
Excuse, me though. I might be mixing up my definition of “glass transition”. It’s a term used for plastics (and other amorphous solids) when they start to becomes malleable.
In the above case, I think I tried to apply it to quartz which is incorrect. The temperature ranges are still in the ball park of my intent.