Anneal or toughen by a process of gradually heating and cooling

Usage examples of tempering.

Of that great, tempering, benign shadow over the continent, tempering its heat, giving shelter from its cold, restraining the waters, there is left about 65 per cent in acreage and not more than one-half the merchantable timber--five hundred million acres gone in a century and a half.

Whether a discord is too violent or no, depends on what we have been accustomed to, and on how widely the new differs from the old, but in no case can we fuse and assimilate more than a very little new at a time without exhausting our tempering power - and hence presently our temper.

Perhaps the Grand Healers of Shardana have had more success than they claim in tempering the violence in our souls.

Tempering the wind to their sensitive self-esteem, he offered to permit the Mayor and the Secretary of the Interior to withdraw their resignations bare of comment, statement or apology.

And, as he had a peculiar love for his master Socrates, he made him the speaker in all his dialogues, putting into his mouth whatever he had learned, either from others, or from the efforts of his own powerful intellect, tempering even his moral disputations with the grace and politeness of the Socratic style.

He learned the methods of collecting bog iron, of smelting, casting, forging, hardening and tempering.

He could smell the clean hot scent of burning charcoal from the big shed up ahead of them, hot metal, sneeze-making cinders, the heavy frying smell of the oil bath used for quenching and tempering.

He had already made himself late for the market opening by taking her on and tempering his speed for her comfort.

You know how it is, you're tempering something, it like rilly has to be done in its own time.

The duplication of tempered glass is a matter of determining, whether by library research or experiment, the necessary parameters, such as tempering temperature and cooling rate.