When CNC machining titanium, it's essential to use tools specifically designed for the material's unique properties. Here are some of the most commonly used tool types:

· Carbide tools with hard coatings: These tools, often coated with materials like TiAlN or TiCN, provide a hard, wear-resistant surface that can withstand the abrasive nature of titanium.

· Solid carbide end mills: These end mills offer excellent rigidity and cutting performance, making them suitable for a variety of machining operations on titanium.

· Ball nose end mills: Ball nose end mills are ideal for finishing operations on titanium, providing a smooth, burr-free surface.

· Drills: High-speed steel or carbide drills with appropriate flute geometry and point angles are used for drilling holes in titanium.

It's important to select tools with sharp cutting edges and appropriate geometries to minimize tool wear and improve machining efficiency.