What's the point in going titanium, weight, ride, or both?
Both! There is a synergistic effect from both the lighter weight and the mechanical properties of TI. It reacts much faster to terrain input than even the high quality Chrome / Silicone steel springs. Which allows the suspension to remain in contact with the ground more (read-traction and control) as well as eliminating the harshness. It is one of the things one must feel to realize the true difference and the short comings of steel springs and the shock valving they do to try and compensate for the harshness / mecanical properties of the Chrome / Silicone steel. But for the money the high quality Chrome /silicone steel springs are pretty good. The junk springs all the OEM's put on as standard are not even in the same ballpark as either of the above options.
I would go as far as to say; a Sled with the wrong rate RCS TI springs will still ride better than a properly set up steel sprung sled. I am no expert, just my observation and personal expirence over the years. FWIW
In my opinion, if you are buying springs; get at least the high quality Chrome / Silicone steel springs (Ebach and others), but for the ultimate ride / performance RCS TI springs are worth the investment. The RCS TI's will never fatigue, they never sag, they will out live you and all the sleds you install them on. That said beware of the lesser cheaper TI knock offs like cat used on the HCR and other sleds although even those are way better than the OEM steel springs.