I looked up the knife. The CRKT HZ6 has 3.1 mm stock thickness and an extremely fine point. It is clearly meant for fast and effective stabbing of soft tissue. When you say he mangled the tip, what did he do and what was the damage it caused? I get he was practicing on a pole, but was it a slash and he hit a screw and the tip broke, or he stabbed it deep in the wood and pulled it away again too aggressively and not straight back along the path of entry but with a bend or twist? There is a lot of room for interpretation in what you said. He could be training with a trainer instead of a live blade, too.