Real titanium is silver-gray. When decorating handicrafts and daily necessities with gold, it is easy to puncture and wear because of its low hardness, and it is not durable. Coating titanium nitride on the surface of these substances has almost the same appearance as gold plating, but it is more wear-resistant than gold and cemented carbide. This coating is called "never wear-resistant".

So the necklace you are talking about is not pure titanium, but titanium nitride.

Titanium gold is commonly known as pure titanium and titanium alloy. It is hard in texture, light in weight and resistant to erosion. Generally speaking, titanium gold is mainly used in engineering and aviation industry. Pure titanium and titanium alloys have only recently been used as jewelry, and their popularity index is rising.

At present, there are pure titanium jewelry on the domestic market, but it is really rare. Titanium ornaments on the market mainly contain titanium metal, not pure titanium.

Titanium gold, also known as space metal, has future characteristics. It is tough, corrosion-resistant, silvery white, will not turn black, and is not allergic to anyone. It is the only metal that has no effect on human autonomic nerves. Its unique silver-gray tone has a good performance in high polishing, mercerizing and matt. Besides gold and silver, the most suitable jewelry material is commonly known as titanium gold on the market.

Titanium alloys are widely used in the medical field. Titanium gold has stable chemical properties and excellent biocompatibility. In human body, it can resist the corrosion of secretions, is nontoxic, and is suitable for any sterilization method. Because hotel titanium products have the characteristics of corrosion resistance and high stability, chemical reactions will not occur when substances contact.

Titanium gold, as its name implies, is a heroic metal, bright silver, light and strong. It has excellent corrosion resistance to most chemical media. Chemically, the famous strong corrosive agent "aqua regia" can devour silver and gold, and even corrode stainless steel, which is called "stainless" and becomes rusty beyond recognition. However, "aqua regia" is helpless to titanium gold.

Titanium gold has been soaked in "aqua regia" for several years, and it is still shining! High strength can be maintained in such a wide temperature range from 253℃ to 500℃. Therefore, the metal products made of titanium gold will not deform and fade, and are easy to maintain. You only need to wipe it gently with cotton cloth to restore the luster. The longer it takes, the better the color will be.

Titanium jewelry is very popular in western countries, which is a new thing for China people. However, the domestic titanium gold production is weak and the foreign price is very high, which makes people flinch. Only a few domestic manufacturers can produce and process real titanium jewelry.

Titanium jewelry can be colored independently by technical means, without gold plating, or inlaid with gems. Among them, prong setting's gem technology is extremely demanding, and only a few manufacturers at home and abroad can do it. These are difficult technological breakthroughs for titanium, which is second to none in China and hard to find abroad.

References:

Baidu Encyclopedia: Titanium Gold