Question:
The main purpose of annealing is to
The main purpose of annealing is to
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Annealing removes internal stresses in glass by controlled heating and slow cooling.
Updated On: May 7, 2026
- Increase optical clarity
- Relieve stresses
- Harden the surface
- Add color
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The Correct Option is B
Solution and Explanation
Concept:
Annealing is a heat treatment process used to remove internal stresses from glass or ceramic products.
Step 1: During forming and cooling, glass develops internal stresses because different parts cool at different rates.
Step 2: If these stresses remain, the glass may crack or break later.
Step 3: In annealing, glass is heated or held near annealing temperature and then cooled slowly.
Step 4: Slow cooling allows internal stresses to relax. Therefore, the main purpose of annealing is: \[ \boxed{\text{Relieve stresses}} \]
Step 1: During forming and cooling, glass develops internal stresses because different parts cool at different rates.
Step 2: If these stresses remain, the glass may crack or break later.
Step 3: In annealing, glass is heated or held near annealing temperature and then cooled slowly.
Step 4: Slow cooling allows internal stresses to relax. Therefore, the main purpose of annealing is: \[ \boxed{\text{Relieve stresses}} \]
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