survetöötlusprotsess pooltoodete või toodete tootmiseks ümar-, nelikant- vm ristlõikega mahttoorikust; mahtvormimise erimiteks on valtsimine, ekstrudeerimine, tõmbamine, sepistamine ja vormstantsimine, forming process, such as extrusion, forging, rolling, and drawing, in which the input material is billet, rod, or slab form and a considerable increase in surface-to-volume ratio in the formed part occurs under action of largely compressive loading