flex, bend, deform, twist, turn -- (cause (a plastic object) to assume a crooked or angular form; "bend the rod"; "twist the dough into a braid"; "the strong man could turn an iron bar")
deform -- (become misshapen; "The sidewalk deformed during the earthquake")
deform, distort, strain -- (alter the shape of (something) by stress; "His body was deformed by leprosy")