I don't think you have to worry much about the TSA taking it; their rules say it's OK in your luggage. What you DO have to worry about is some yahoo in the baggage area stealing it if they spot it on the X-ray. Or opening your bag out of curiosity and damaging the blade. I have packed mine in those lead bags used to shield high-speed photo film from X-rays, and they've never been opened.
Still, I'm not taking my Renaissance on a trip... I'll make do with a couple of Double Arrows. :)