DO OLDS CLUBS GO TO HEAVEN ??

Serious for a change, as a club (titanium head) sustains constant , repetitive overuse through striking hundreds of balls, what happens to its structural integrity. Has anyone noticed a perceptible change in the performance of a well used head ? Do they play flatter (not trajectory) gradually until failure or do they hit as new over time until they crack? Similarly do shafts lose their stiffness and kick over time? Is there a time frame based on balls hit until noticeable change as opposed to new? or is it a good idea to reequip every year? Reason Im asking... I hit a ton over the winter, sometimes in snow, cracked several heads as expected when hitting iceballs in 15*weather, but noticed that several of the survivors seem to have a flatter softer feel on impact. Just curious.....RON :twisted: