Now there is some malicious manufacturers of counterfeit titanium and titanium alloy bar, or shoddy sales, therefore, we at the time of purchase, need to know how to distinguish between true and false titanium bar. A relatively simple is using his hands, if feel lighter, one of which is the difference between the titanium frame and non titanium frame of the most simple way, in a reference to the production standards of titanium (titanium rod production grades and standards).
通常钛合金架的比重约为8.9g/cm3，而纯钛架的比重为4.5g/cm3，因为钛棒的份量相当于合金架的一半。焊痕为“台阶”状；钛合金棒的焊接为点焊，调查鼻托梗和鼻托箱的焊接点，而纯钛料的焊接为无氧碰焊。焊痕为“坡”状，这是区别钛架和非钛架、全钛和非全钛架的有用办法之一。因而，查看铰链处有没有垫片，也是辨别能否是纯钛棒的一种比较有效的办法。
Usually the titanium alloy frame weight is about 8.9g/cm3, and pure titanium frame for the proportion of 4.5g/cm3, because half of the titanium rod weight equivalent to the alloy frame. Weld mark for "steps" shape; titanium alloy rod welding for welding, welding point survey the nose support stem and a nose support box, and the welding of pure titanium material for oxygen welding. Weld mark as "Po", this is the difference between the titanium frame and non titanium frame, effective measures of titanium and titanium frame of non full. Thus, the hinge has no gasket, is also to identify whether it is a effective way to pure titanium rod.