spannungsfrei machen
anneal
de-energize
disconnect from the supply
distress
isolate from the supply
make free from angle strain
make non-stressed
make strain-free
make strainless
make stress-free
make stress-relieved
relaxation
remove stress
stress-relieve
temper
to anneal
to de-energize
to distress
to stress-relieve
to temper