Cold Working processes include
Cold Rolling - a billet or strip is passed between two rollers with a smaller gap (obviously) than the thickness of the billet or strip. The rolling compress the metals and elongation occurs in the rolling direction.
Drawing - barstock is passed through a die, which is how wire is made.
Pressing - a metal (e.g. copper or copper alloy) sheet is pressed onto a shaped die or mould to form an intricate shape.
Stamping - a punch is passed through a sheet of metal (e.g. copper or copper alloy)
Cold working, the permanent (plastic) deformation of a metal below its recrystallization temperature (and usually below its annealing temperature), produces additional dislocations within the metal's crystal lattice. Cold working induces Work Hardening
See also - Annealing, Hot Working, Quenching - http://learningzone.coruseducation.c...eelch2pg3.html