"What controls the deformation of a metal object is the way that defects, called dislocations, move along planes in its crystal structure," Minor says. "The result of dislocation slip is plastic ...

Plastic deformation of metals results from the motion of a high density of dislocation lines. A strong shock produces an unusual number of dislocations within a metal's crystalline lattice ...

caused by twin boundary–dislocation interactions dominates plastic deformation in orthogonal twin-boundary samples, whereas detwinning is a governing deformation mechanism in slanted twin ...

A rubber band undergoes elastic deformation when stretched a little. A metal drinks can undergoes plastic deformation when it is squashed.