Final answer:
The purpose of annealing copper tubing is to soften the metal and make it more malleable and ductile.
Step-by-step explanation:
The purpose of annealing copper tubing is to soften the metal and make it more malleable and ductile.
By heating the copper tubing to a specific temperature and then slowly cooling it, the crystalline structure of the metal is changed, which helps to relieve any internal stresses and makes the copper tubing easier to bend and shape.
This annealing process is used in high-temperature applications where flexibility and durability are necessary, such as furnace tubes, lighting tubes, and melting crucibles.