I found a partial answer to my question reading another posting of yours saying;
Hard, rigid materials all have a unique sonic vibrational character that affect the musical palette. Titanium is generally amongst the most audio-friendly, sonically neutral of rigid materials.
All three versions of Cone/Spike Decoupling Gliders improve a system's audio because of the decoupling and isolation function that they provide. Sonic differences between brass, stainless, and titanium Gliders will be quite subtle, but noticeable in a highly resolving system, with titanium giving a bit more of a pure result.
If budget considerations are most important, brass would be the best value (or stainless if it's a better aesthetic match). If sonic results are most important, titanium is the best value.
Herbie's Audio Lab