There was a SmarterEveryDay video about an iterative formed manufacturing process where two robots basically pinch sheet metal to form complex 3d objects.

It's almost like additive manufacturing a la FDM 3d printing where you layer up the part. One of those processes/techniques that I had never even considered but is obvious once seen. Very mind (and metal) bendy.

Recommend a watch: https://www.youtube.com/watch?v=dCXu8Ju_fdY