Process for producing a spring and/or a torsion bar comprising the following steps: a) providing a steel wire ; b) thermomechanically forming the steel wire provided in step a) above the minimum recrystallization temperature of the steel wire , said steel wire having an at least partly austenitic structure; c) cooling the steel wire thermomechanically formed in step b); d) tempering the steel wire , comprising I. heating the steel wire cooled in step c) at least to a hardening temperature equal to or greater than the austenite start temperature; II. quenching the steel wire heated at least to the hardening temperature in step I. to a first cooling temperature, the first cooling temperature being a temperature below the minimum recrystallization temperature of the steel wire , and an at least partly martensitic structure being established; III. reheating the steel wire quenched in step II. to a first annealing temperature which is less than the austenite start temperature; IV. cooling the steel wire reheated in step III. to a second cooling temperature, the second cooling temperature being at least less than the first annealing temperature; e) cold forming (20', 20") the metal wire tempered in step d) at a cold forming temperature, the cold forming temperature being a temperature below the minimum recrystallization temperature of the steel wire ; f) separating the steel wire cold-formed in step e); characterized in that with cooling of the steel wire in step c) to a temperature below the minimum recrystallization temperature it is cooled such that at least a partly ferritic-pearlitic structure is established in the steel wire . a) providing a steel wire ; b) thermomechanically forming the steel wire provided in step a) above the minimum recrystallization temperature of the steel wire , said steel wire having an at least partly austenitic structure; c) cooling the steel wire thermomechanically formed in step b); d) tempering the steel wire , comprising I. heating the steel wire cooled in step c) at least to a hardening temperature equal to or greater than the austenite start temperature; II. quenching the steel wire heated at least to the hardening temperature in step I. to a first cooling temperature, the first cooling temperature being a temperature below the minimum recrystallization temperature of the steel wire , and an at least partly martensitic structure being established; III. reheating the steel wire quenched in step II. to a first annealing temperature which is less than the austenite start temperature; IV. cooling the steel wire reheated in step III. to a second cooling temperature, the second cooling temperature being at least less than the first annealing temperature; I. heating the steel wire cooled in step c) at least to a hardening temperature equal to or greater than the austenite start temperature; II. quenching the steel wire heated at least to the hardening temperature in step I. to a first cooling temperature, the first cooling temperature being a temperature below the minimum recrystallization temperature of the steel wire , and an at least partly martensitic structure being established; III. reheating the steel wire quenched in step II. to a first annealing temperature which is less than the austenite start temperature; IV. cooling the steel wire reheated in step III. to a second cooling temperature, the second cooling temperature being at least less than the first annealing temperature; e) cold forming (20', 20") the metal wire tempered in step d) at a cold forming temperature, the cold forming temperature being a temperature below the minimum recrystallization temperature of the steel wire ; f) separating the steel wire cold-formed in step e); <EOS>