There are many different types of materials that can be used on a lathe. Anything from metals like aluminum, steel, and titanium to plastics, wax, and delrin can be used on a lathe. The different materials used must be within the size limitations of the machine (8" diameter, 42" length). The material used also affects aspects of manufacturing, like the speed the lathe rotates at. All of this must be factored in while deciding on the best material to use.