The process by which metals become more resistant to wear and tear by freezing them to low temperatures is known as

Cryogenic softening

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Cryogenic hardening

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Eugenic softening

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Eugenic hardening

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Solution

The correct option is B
Cryogenic hardening

Cryogenic hardening is a cryogenic treatment process where the material is cooled to approximately − $185^{\circ}$ C, usually using liquid nitrogen. This makes the metals more resistant to wear and tear.

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Cryogenic __ is the process by which metals become more resistant to wear and tear by freezing them to low temperatures.

When metals are frozen to low temperatures, they are less resistant to wear and tear.

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