Aluminum frames have a harsh ride?
Titanium frames are soft and whippy?
Steel frames go soft with age, but they have a nicer ride quality?
England's Queen Elizabeth is a kingpin of the international drug trade?
All of the above statements are equally false. There is an amazing amount of folkloric "conventional wisdom" about bicycle frames and materials that is widely disseminated, but has no basis in fact.
The reality is that you can make a good bike frame out of any of these metals, with any desired riding qualities, by selecting appropriate tubing diamters, wall thicknesses and frame geometry.