Meaning & use

annealed

verb·Advancedtechnical

Last updated

UK/əˈniːld/
US/əˈniːld/

“annealed” is a form of “anneal”. See that entry for the full set of meanings.

Meanings

  1. verbtransitivetechnical

    heated and then cooled slowly to make glass or metal stronger and less likely to break.

    Grammar: Annealed is the past participle; the full verb is anneal, which takes an object: anneal the glass.

    Patterns

    • anneal something
    • be annealed at a temperature

    The glass was annealed in a special oven to remove internal stress.

    After the metal had been annealed, it could be bent without cracking.

  2. verbtransitivetechnical

    made stronger or more flexible by a process of heating and slow cooling.

    Grammar: Used in the passive: the metal is annealed. The active form is anneal something.

    Patterns

    • anneal something
    • be annealed

    The copper pipes were annealed so they would not break under pressure.

    Carefully annealed steel can withstand repeated stress.

Word forms

base formanneal
third person singularanneals
past tenseannealed
past participleannealed
-ing formannealing

Common combinations

annealed glass
The window was made of annealed glass, which breaks into large pieces.
annealed metal
The workshop specializes in annealed metal for musical instruments.
fully annealed
The wire is fully annealed and very soft.
annealed at a temperature
The material is annealed at 600 degrees Celsius.

Synonyms and how they differ

tempered
Tempered usually means made stronger by a different process, often involving rapid cooling; annealed means made softer and less brittle.
heat-treated
Heat-treated is a general term for any heating process, while annealed refers specifically to slow cooling to soften.

Word family

anneal verb
To heat and cool slowly to make something stronger or softer.
annealing noun
The process of heating and slowly cooling a material.

Commonly confused: annealed or annexed?

annealed vs annexed

Annexed means taken over or added (as territory); annealed is about heating and cooling.

Practice

The metal was ______ to make it softer and easier to shape.

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