anneal

As the hammering hardens the metal it is necessary to anneal it each time after going over the surface.

Taps once out in length seem to get worse at every heating, whether to anneal or to harden.

Flange one end of this tube a little, and anneal the flange well in the smoky flame.

The whole of the end of the tube is now cautiously reheated and then cooled slowly to anneal it.

Anneal with great care, and cool in such a position that the acid cannot reach the hot glass.

Particular pains must be taken thoroughly to anneal the alloy when worked into bars.

Anneal and repeat until the sides are at right angles to the base.

Heat the file in the forge fire to draw the temper and anneal it by covering it with ashes.

As the hammering goes on the metal becomes brittle and hard, and then it is passed though the fire to anneal or soften it.

Malleable or wrought iron, if subjected to pressure, becomes brittle, and it is necessary to anneal it.