CNC (Computer Numerical Control) machining is a manufacturing process that utilizes computerized controls to operate machine tools and produce precision parts. The choice of processing materials in CNC machining depends on the specific application and requirements. Here are some commonly used materials:

1.     Metals: CNC machining is widely used for metal fabrication. Common metal materials include:

•      Aluminum: Lightweight, corrosion-resistant, and easily machinable.

•      Steel: Durable and strong, available in various grades for different applications.

•      Stainless Steel: Resistant to corrosion, heat, and chemical damage.

•      Brass: Exhibits good electrical conductivity and is often used for decorative parts.

•      Copper: Known for its excellent thermal and electrical conductivity.

•      Titanium: Lightweight, high strength, and corrosion-resistant but more challenging to machine.

2.     Plastics: CNC machining is also suitable for working with various plastic materials. Some examples include:

•      Acrylic (PMMA): Transparent, rigid, and often used for displays and signage.

•      ABS (Acrylonitrile Butadiene Styrene): Tough, impact-resistant, and commonly used in consumer products.

•      Nylon: High strength, low friction, and excellent wear resistance.

•      Polycarbonate: Impact-resistant and commonly used for safety goggles, windows, and transparent parts.

•     Polypropylene: Lightweight, chemical-resistant, and used in packaging, automotive parts, etc.

3.     Composites: CNC machining can handle certain composite materials, which are combinations of different materials. Examples include:

•      Carbon Fiber Reinforced Polymer (CFRP): Lightweight, high strength, and used in aerospace, automotive, and sports equipment.

•      Fiberglass Reinforced Plastic (FRP): Lightweight, strong, and commonly used in construction and automotive applications.

It's important to note that there are many more materials available for CNC machining, and the choice depends on factors such as the desired properties, cost, manufacturability, and specific application requirements. Additionally, advancements in material science continually introduce new materials that can be machined using CNC processes.