When the stone enters the cone crusher, titanium carbide rods are hit first. Due to the high hardness of titanium carbide rods, titanium carbide rods wear very slowly. On the other hand, the small broken stone touches the gap of two rods. Crushed small stones have low impact, but can also harden areas of high manganese steel matrix. When the rods worn out, the manganese steel matrix had hardened. This is the reason why TIC inserts cone liners span life more than manganese steel cone liners.