deform

make formless; "the heat deformed the plastic sculpture"

twist and press out of shape

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"

become misshapen; "The sidewalk deformed during the earthquake"

alter the shape of (something) by stress; "His body was deformed by leprosy"

assume a different shape or form