What materials are typically used for workpieces in machining?

The correct answer identifies metals, plastics, and composites as typical materials used for workpieces in machining.

Machining processes primarily involve subtractive manufacturing techniques, where material is removed from a solid block to create parts with precise dimensions and finishes. Metals are widely used due to their favorable properties such as strength, durability, and machinability. Common metals in machining include various steels, aluminum, and other alloys, which can be easily shaped and finished through processes like turning, milling, and drilling.

Plastics are also prevalent in machining because they can be machined with relative ease and can be produced in a variety of grades to suit specific applications. Their lightweight and corrosion-resistant properties make them ideal for numerous components across different industries.

Composites, which consist of two or more materials, offer unique advantages such as high strength-to-weight ratios and customized properties. They are increasingly used in industries like aerospace and automotive for parts that require specific performance characteristics.

The other material options listed are less commonly used as workpieces in machining. While wood can be machined, it is more often associated with woodworking processes and may not require the precision that machining provides. Rubber and glass also lack the necessary machinability for traditional metalworking techniques. Ceramics, fabrics, and