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).
通常鈦合金架的比重約為8.9g/cm3，而純鈦架的比重為4.5g/cm3，因為鈦棒的份量相當于合金架的一半。焊痕為“臺階”狀；鈦合金棒的焊接為點焊，調查鼻托梗和鼻托箱的焊接點，而純鈦料的焊接為無氧碰焊。焊痕為“坡”狀，這是區別鈦架和非鈦架、全鈦和非全鈦架的有用辦法之一。因而，查看鉸鏈處有沒有墊片，也是辨別能否是純鈦棒的一種比較有效的辦法。
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.