I just bought my first carbon bike the other day, but I haven't been able to ride it yet.

That said, aluminum is quite stiff, so if the AL frame didn't break, it's likely a good carbon one wouldn't either. Carbon breaks when it is forced in a direction opposite to 'normal'. So it's easier to crack a top tube with a bike rack than it is to break a frame by just riding on a rough road.

But my heart belongs to Ti for both excellent road feel and durability.