Titanium alloy glasses holders will be slightly heavier than pure titanium glasses holders, but both are high-quality materials, so they feel more comfortable from the outside.

. Pure titanium glasses frames will not contact with the oxygen in the vacuum during welding; and titanium alloy frames use welding method (called: spot welding), welding traces are "slope" shape, is one of the most effective ways to distinguish between the two frames,

. Pure titanium glasses frame will not directly contact titanium in the hinge part; and titanium alloy glasses frame will directly contact titanium, easy to cause the joint wrinkle and obvious poor mirror leg opening and closing.

. The specific gravity of pure titanium is generally 4,5, and titanium alloy is 8,9, material equivalent to half of titanium alloy. So the handmade eyeglasses holders are relatively light, which is the easiest way to distinguish between the two eyeglasses frames.