You're absolutely right! Titanium can indeed be CNC milled, but it presents some unique challenges compared to softer metals. Here's a breakdown of why specific tooling and techniques are necessary:

Strength and Heat Resistance:

l Tough Material: Titanium is a very strong metal, making it more challenging to machine than softer materials like aluminum. This requires robust cutting tools and higher cutting forces during the CNC milling process.

l Heat Generation: The machining process generates heat. Titanium has high heat resistance, which can be a double-edged sword. While it doesn't melt easily, excessive heat can damage the cutting tools and negatively affect the machined surface of the titanium part.

Specific Tooling and Techniques:

l Sharp and Durable Cutters: CNC milling titanium requires using specially designed cutting tools made from very hard and wear-resistant materials like carbide or specific tool steels. These tools can withstand the cutting forces and maintain sharp edges for clean cuts.

l Low Speed and High Torque: To minimize heat generation and prevent tool wear, CNC milling of titanium typically utilizes lower spindle speeds compared to softer metals. However, the cutting process might require higher torque to overcome the material's strength.

l Coolant Management: Using a high-pressure coolant throughout the machining process is crucial. The coolant helps dissipate heat from the cutting zone, protecting the tools and ensuring good surface quality on the titanium part.

Advantages of CNC Milling for Titanium:

l Precision and Complexity: CNC milling offers exceptional precision and can create intricate geometries on titanium parts. This is crucial for applications like medical implants or aerospace components.

l Strength-to-Weight Ratio: Titanium's high strength-to-weight ratio makes it ideal for parts requiring both durability and minimal weight. CNC milling allows for efficient creation of such parts.

l Design Flexibility: CNC milling can accommodate a wide range of titanium part designs, from simple shapes to complex geometries.

Overall:

While CNC milling titanium requires specific considerations and specialized tooling, it remains a valuable manufacturing technique for creating high-precision, high-strength parts from this versatile metal. If you have a titanium part design in mind, consulting with a qualified CNC machining service provider can help determine if CNC milling is the most suitable approach for your application.