Hi BoulderGal and welcome to TE!
I really can't answer your question as I have never had a ti bike, but I've had a couple of full carbon frames and love them. Yes, if it's windy, you may get blown around a bit (I am also light in weight), but having a lighter bike for climbing offsets any negatives, to me. My only advice is to test ride anything you can get your hands on that fits you and see what you think. That said, I have never followed my own advice, as I am short and have ended up buying my last few bikes online. Still, after a few tweaks, I've been super happy with them.
I hope you find what you are looking for!
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow