What properties should the metal from which the spirals or strips of the heating element are made?

Since the purpose of the element is to heat, it must have a high temperature capacity.
It is fashionable to confuse heat resistance with refractoriness with melting resistance. In fact, the correct answer is heat resistance, so that the material remains without any noticeable changes in structure at high temperatures.
A striking example is nickel, which is often found in tasks.