I was curious so I looked it up...
AL - 40k psi tensile strength, $3.70/ft
TI - 50k psi, $36.21/ft
316 Stainless - 70k psi, $2.54/ft
Normal grade steel (B7) - 120k psi, $3.57/ft
High-strength Steel (Grade 8) - 150k psi, $5.72/ft
I'm kinda surprised. Unless you have to worry about EM...