itanium spreader bar

huangyhg

titanium spreader bar
i'm into territory that i've not been in before.  titanium alloys.  i have this spreader bar (basic simply supported beam) that is to be made of cp ti gr2 (astm b348 gr2).  it is in the shape of a milled dumbbell with the thinner diameter of 1.875" @ 69.5鈥?long and the end diameters of 2.5" @ 1.25鈥?long, each.  therefore i have a 72" long spreader bar with two pick-up points and two load points.  i was given a load and safety factor and have to determine if this configuration will suffice.  i have a few questions:
1. using titanium instead of steel, what design equations do i use?
2. are the factors still the same between steel and titanium when checking yielding and shear?
3. can i even use the same equations for plastic design as stated in the aisc lrfd manual?  it states, 鈥溾