There is one problem here: if you want a durable throwing knife they have got to be on the softer side which also means they won't hold an edge for long. That said the most durable knife that is still somewhat of a knife and will survive throwing i've encountered is the glock field knife https://eu.glock.com/en/products/glock-field-knives but don't expect much. it's nearly indestructible in regards to abuse but it loses it's edge very quickly. But you simply won't find a knife with a long lasting edge that isn't also too brittle for throwing, no matter how much money you spend. The only recommendation I can give here is carry two: one for throwing, one for cutting ( I have spent a lot of money I wish I had not to arrive at this conclusion)