It is difficult to drill holes in titanium alloy workpieces. Drill bits are generally made of ordinary high-speed steel and hard alloy, and a double top angle of 118 ° or 90 ° is better because it can cut chips and make them easy to remove. Timely chip removal is very important during the drilling process. If the chips are not removed in time, the drill bit may get stuck, broken, stuck, and other situations may occur.

High drilling temperature and pressure will enhance the biting effect of titanium workpieces, causing rapid tool wear and resulting in uneven drilling, deviation, or uneven hole circumference. Subsequent threading may cause the screw to break in the hole. To solve these difficulties, short and sharp drill bits can be used, sufficient coolant can be poured into the cutting area, low-speed forced feed can be adopted, and sturdy supports can be used to support the workpiece. Special attention should be paid to not forming burrs at the outlet.

Except for thin plates, heavy-duty short drills can be used for thick workpieces. Deep hole drilling can be carried out sequentially using oil drills or a series of short drill bits of different lengths. The drill bit should remain in the drilling state inside the hole and is not allowed to idle in the borehole. Throughout the drilling process, a low and constant drilling speed should be maintained.

Be careful when drilling through the hole. When the hole is about to be drilled through, it is best to retract the drill bit in order to clean the drill bit and drill hole, and remove drilling debris. When the final hole is broken, a strong feed is used to obtain a smooth hole.

Use sufficient coolant to remove the drill cuttings, otherwise they should be cleaned regularly.