Final answer:
Annealing a bandsaw blade after welding helps relieve internal stresses, improve hardness, durability, and machinability, and prevent brittleness and breakage.
Step-by-step explanation:
After welding a bandsaw blade, it is important to anneal it in order to relieve internal stresses and improve its hardness, durability, and machinability. Annealing involves heating the blade to a specific temperature and then allowing it to cool slowly. This process helps to prevent the blade from becoming brittle and breaking during use.