Ethic's 12 STD Titanium Axle is made out of 6AL-4V (Grade 5) titanium and is 40% lighter than the traditional version. Two hex/allen 6mm to Neotorx adapters are included if you don't have Ethic's Torx 40 Wrench already.
The axle comes in many different sizes; please refer to the specifications to determine which is best for your deck/fork.