Are you referring to the brand "TiKnives", or do you mean a Ti bladed knife?
Can't help you with the first one, but IMO, Ti blades will take a nice edge, and although they lose it fairly quickly, they resharpen pretty easily. I like my Boker Orion as a dress knife, but since it needs a touch up pretty much every time I carry it, I don't know that I'd use it for extended duty.
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AKTI Member #A000832
"A man's got to know his limitations." - Dirty Harry