You can get aluminum bolts, nuts, washers, etc. which can be used for non-critical areas. They weigh about a third of what steel hardware does. They're also a lot cheaper than titanium.
I've considered that as one of my future projects to reduce more weight; switching out steel fasteners for aluminum in the front of the car wherever reasonable to do so. Might be able to save 5-10 lbs that way. Not a critical thing to do but just one of those casual projects for a weekend.
Blue Angel is here!!
1SS/RS LS3 M6 IBM