I have always found aluminum to be light, rigid, transmits a lot of road vibration. Steel (12 speed Kabuki) frames seem to be less rigid, transmit less road vibration. Carbon (LeMond Versailles) to be rigid but absorbs vibration, has a "feel" somewhere between aluminum and steel. I know there are many posts re: Titanium but I would like for someone with experience to compare Ti to the above. If the above observations do not seem correct, I invite comment/observations. If someone can relate specific advantageous ride characteristics of each frame material to road, cyclocross, MTB and touring that would be great.