ANNEALING

To subject to great heat and then (often slow) cooling, and sometimes reheating and further cooling, for the purpose of rendering less brittle; to temper; to toughen.

To cool glass slowly, to minimize internal stress.

To burn colors onto a glass or other surface.

The heating of solid metal or glass to high temperatures and cooling it slowly so that its particles arrange into a defined lattice.

"Without annealing, the quality of our metal products will diminish."