1. Titanium flat head screws are much lighter than the alloy ones. 2. Material: Gr. 1, 2, 5, 7 and 12 Titanium. 1. Titanium flat head screws are much lighter than the alloy ones.1) Material: Gr. 1, 2, 5, 7 and 12 Titanium.2) Specification: Metric, DIN, UNC and UNF. High quality Titanium Flat Head Screw