20%
Titanium Lug Nuts - 2.5X Stronger Than Steel
Compare tensile strength of various metals, especially aluminum,steel and titanium which are frequently used for lug nuts.
These are 19mm hex and are exactly the same dimensions as steel lug nuts but they weigh about half (13oz vs 25oz) as steel, but they will not corrode like steel, or scratch/deform like OEM aluminum lug nuts (avoid those please).
Made of Ti 6Al-4V more commonly referred to as Grade 5 Titanium Alloy. It's very high strength and light weight and make for perfect for fasteners. Lubricate and torque and roll strong.