Anneal

Anneal-v
1-(vti) to subject an alloy, metal, or glass to a process of heating and slow cooling to make it tougher, and less brittle
2-(vti) to subject nucleic acid to a process of heating and cooling in order to separate strands
3-(vt) to make something, especially an opinion, a feeling, or an intention, stronger, firmer, or more resolute (literary)