An advantage of the Hogue slip on grip is it may provide a better non-slip surface on the grip for better control. If it has finger indexing, this may also help. IMO, it will not reduce recoil. However, if you are able to better control the firearm you may perceive the recoil as being less. Make sure you are using the proper grip and form. Proper grip and form will help a lot with handling recoil and controlling muzzle flip.
I believe Taurus specifies what types of ammo should be used in their titanium revolvers. Certain bullet weights and powder charges can have an adverse affect on the titanium parts.