Most tap and die sets are made of carbon steel, cobalt or HSS. Many workers like the material of their components to be forged when it comes to purchasing tap & die sets. However, working with titanium will result in less wear which can be more cost-effective in the long run. The difference between these two types of materials is that forged tools have a higher tolerance for heat and better grain structure of metal resulting in quicker wear rates which may not be ideal if you use the same set every day for an extended period of time whereas titanium has sharper edges on its surfaces so there are less opportunities for slippage.