Grain size remains a critical factor in determining tungsten carbide’s properties: Fine Grains (0.5 µm): Provide high hardness and wear resistance, essential for cutting and drilling tools. Coarse ...

Tungsten-carbide tipped (TCT) and titanium nitride coated (TiN) drill bits are also popular. HSS is hard-wearing, but other materials can be added to make the drill bits harder and longer-lasting.