The hot and cold cycle is the process of heating and cooling a substance in order to create a desired effect. The consequences of this process can be positive or negative, depending on the intention of the person carrying out the cycle. For example, if someone is trying to weld two pieces of metal together, the hot and cold cycle will likely have positive consequences, as the metals will be joined together. However, if someone is trying to break apart a piece of metal, the hot and cold cycle will likely have negative consequences, as the metal will be weakened and may break.