I have several poles, a cheapo pair and one that says it is a Lekisport Titan Denali.

 One of the cheapo's has lost the carbide insert to the tip - the metallic part that extends, what, 3mm from the very end. There's paobably a name for it but I don't know it.

The lekisport has an intact tip but a badly mangled lower section. I'd like to take the lekisport tip and put it on the cheapo to have a pair of poles again.

Can this be done? I see Leki sell tips (the lekisport is NOT a leki) so theirs must come off but do others? How do I try to do this?  

Right, without reading Lindsay's post (thanks) I had a quick go with a hammer (no mallet available) and no dice.

The hot water worked a treat though, a minutes immersion in boiling water and it came off with a quick twist of a mole grip.

Thanks both for the ideas, where would we be without OM?