Jim K wrote:Titanium bolts?
I don't know how they compare to steel ones. This is something the mechanical guys can tackle, the 3M's -Maurizio, Mats, Micke?
As far as I know, Ti bolts are only used in corrosive environments but lack in tensile strength. Hardness and tensile strength are different things.
Ti bolts is nice stuff, a bit overdone for what you want here. As the price will shock you a little bit.
I'm not sure what grade the standard bolts are, my memory recalls a 10.9 grade.
JimK states in the post below 12.9 grade, his memory is more often refreshed with this stuff
The standard bolts will just do fine with the correct torque, secured with the correct locktite will do the job!
So for the sake of improving common knowledge:
A Ti gr5 bolt is strength wise (Rp0.2!) just below (90%) a 10.9 grade bolt.
Ultimate strength is just above a 10.9 bolt, but you don't want to use a bolt in that region
But the real advantage: low young's modules, so larger elastic deformation due to the pre-tension.
Which says something about the quality of a connection.
Simply explained, setting/relaxation behavior in the connecting parts has less impact on the end tension in the connection.
Ti has a low density, so low mass with regards to a steel bolt.