On the basis of understanding the processing mechanism of titanium alloys and adding past experience, the main process know-how for processing titanium alloys is as 

follows:

(1) Use inserts with positive angle geometry to reduce cutting force, cutting heat and deformation of the workpiece.

(2) Maintain a constant feed to avoid hardening of the workpiece. The tool must always be in the feed state during the cutting process. The radial tool engagement amount 

ae during milling should be 30% of the radius.

(3) Use high-pressure and large-flow cutting fluid to ensure the thermal stability of the machining process and prevent workpiece surface deformation and tool damage 

caused by excessive temperature.

(4) Keep the blade edge sharp. Blunt tools are the cause of heat accumulation and wear, which can easily lead to tool failure.

(5) Process the titanium alloy in the softest state as much as possible, because the material becomes more difficult to process after quenching, and heat treatment increases 

the strength of the material and increases blade wear.

(6) Use a large tool tip arc radius or chamfer to cut as much as possible into the cutting edge. This reduces cutting force and heat at every point and prevents local breakage. 

When milling titanium alloy, among the cutting parameters, cutting speed has the greatest impact on tool life vc, followed by radial tool engagement (milling depth) ae.