Titanium gold is not gold. 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.

In the mid-1960s, titanium and its alloys have been used in general industries, such as electrodes in electrolysis industry, condensers in power stations, heaters for oil refining and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion-resistant structural material. In addition, it is also used to produce hydrogen storage materials and shape memory alloys.

The heat treatment process of titanium alloy can be summarized as follows:

(1) Stress relief annealing: The purpose is to eliminate or reduce the residual stress generated during machining. Prevent chemical erosion and reduce deformation in some corrosive environments.

(2) Complete annealing: The purpose is to obtain good toughness, improve processability, facilitate reprocessing, and improve dimensional and structural stability.

(3) Solution treatment and aging: In order to improve their strength, α titanium alloy and stable β titanium alloy can only be annealed in production without intensive heat treatment. α+β titanium alloy and metastable β titanium alloy containing a small amount of α phase can be further strengthened by solution treatment and aging.

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