What should be done before every hole when drilling titanium?

When drilling titanium, lubricating the drill bit is essential because titanium is a tough material that generates significant heat during machining. Proper lubrication helps to reduce friction and heat build-up at the cutting edge, which can lead to premature wear of the drill bit and affect the integrity of the hole being drilled. Using lubrication also helps in producing a smoother finish on the hole and prevents the drill bit from binding or catching in the material, thereby ensuring a safer and more efficient drilling process.

While maintaining the cleanliness of the drill, ensuring the correct drill speed, and changing drill bits when necessary are important aspects of machining, they do not specifically address the immediate need for lubrication prior to drilling into titanium, which is critical for the performance and longevity of the drill bit in this application.