I one race recently the of the vets (Paul Ashby) had a racing incident and his carbon bars snapped, he carried on holding the right part of the bar normally and the left hand on the stem practically. The left shifter dangled I presumed he used that. I think he won the vets, broken bars did not seem to slow him down. Every material has it's down sides, ali fatigues eventually, carbon can suffer from repeated impacts and if the protective coatings are removed or damaged exposure to UV or salt water will degrade the resins, Ti can fail suddenly if there are impurities present in the extrusion, steel is just heavy. So use whatever you want one is not better than the other just different and all have there place.