While titanium offers numerous advantages, it presents certain challenges during CNC milling:  

· High Hardness: Titanium's high hardness makes it difficult to machine, requiring specialized cutting tools and techniques.  

· High Reactivity: Titanium readily reacts with oxygen at high temperatures, leading to tool wear and potential part damage. This necessitates the use of cutting fluids and controlled machining parameters to minimize oxidation.

· Heat Generation: The machining process generates heat, which can further exacerbate tool wear and affect part quality. Adequate cooling is essential to dissipate heat and maintain dimensional accuracy.  

· Work Hardening: Titanium tends to work harden during machining, increasing its hardness and making it even more difficult to cut. This can lead to tool breakage and reduced tool life.  

· Chip Evacuation: Titanium chips can be long and stringy, making them difficult to evacuate from the cutting zone. Inefficient chip removal can lead to tool breakage, poor surface finish, and reduced machining efficiency.

To overcome these challenges, CNC machinists must employ specialized cutting tools, optimize cutting parameters, use effective cooling techniques, and carefully consider factors such as tool path strategies and workholding methods.