There are suitable materials that work great with turning processes. Most of the common materials are primarily metals, and a few are plastics. Metal materials include steel, brass, aluminum, nickel alloy, and titanium, while plastics include polycarbonate, PEEK, PEI, and PP.
Turning is done based on the material machinability and the desired surface finishing. Robust workpieces like steel need a specific cutting tool like the single-point cutting tool made from High-speed-steel, and carbide. This works great for high-power operations or specific cutting forces.
Also, some materials such as aluminum, and titanium can be machined with smooth surface finishes and are flexible enough to form complex shapes and sizes.