Final answer:
Materials need to be considered when selecting a joining process for metals. Welding can utilize different heat sources, but the suitability of welding techniques depends on the material type, with exotic alloys potentially requiring advanced methods.
Step-by-step explanation:
In selecting the joining process for materials, one consideration is Materials, such as whether the parts are made out of a standard metal or an exotic alloy. Welding is a joining process that can be employed with a variety of materials using different sources of heat such as gas, electricity, or laser. Knowing the material of the parts is crucial, since not all welding techniques are suitable for all types of metals. For instance, welding standard metals might be straightforward with traditional welding methods, but joining exotic alloys might require advanced techniques such as laser welding to ensure the integrity of the join.