What are the differences between titanium drill bits and black oxide drill bits, and which one is more suitable for heavy-duty drilling tasks?

Titanium drill bits are known for their durability and ability to drill through tough materials like metal and hardwood. They have a coating of titanium nitride that helps reduce friction and heat during drilling. On the other hand, black oxide drill bits are coated with black oxide to increase their durability and resistance to corrosion.

For heavy-duty drilling tasks, titanium drill bits are generally more suitable due to their superior strength and ability to maintain sharpness for longer periods. They are better equipped to handle tough materials and prolonged use without dulling or breaking.