French retro style earrings $ 5.62 Type: Ear Stud Style: Women Modeling: Geometric Packing: in bulk Titanium steel jewelry advantages, long color retention, no allergy, no rust, exquisite shape 1. In the general vacuum gold plating process of steel decoration, most people can keep it for about a year. If the pH value is too acidic or alkaline, the color will become dim. However, it is rare for the alloy ring to turn black after the whole color is lost.