mõningate peeneteraliste materjalide (metallisulamid, keraamika) võime kõrgetel temperatuuridel (üle rekristallisatsioonitemperatuuri) ja kindlatel deformatsioonikiirustel purunemata deformeeruda olulises ulatuses (taval. 200-1000 %), an exceptionally high strain value shown by some metal alloys and ceramics; the phenomenon is associated with the production of a carefully controlled microstructure consisting of very small, equiaxed grains capable of sliding past each other above a critical temperature at a controlled, defined strain rate; extensions of several hundred percent have been reported