If you're careful you shouldn't have a problem. I'm heavier than you and I have no trouble with komperdell carbon fibre poles under normal use. I have broken them, but in this case I had them strapped to my bag on a scramble and didn't screw one in. - a tree caught on the basket, pulled it out overextended, and "snap" - MEC gave me a new bottom piece for free.

Understand that by "normal use" I mean on trails. If you're trying to self arrest with a carbon fibre pole on a mountain, well, you're gonna break it <img src="/forums/images/graemlins/wink.gif" alt="" />