Gold is the metal that does not readily react with air. This is because gold is a noble metal, which means that it has a very low reactivity. This low reactivity is due to gold's high ionization energy, which means that it is difficult to remove electrons from gold atoms. In addition to gold, there are a few other metals that are resistant to corrosion, including:

* Platinum: Platinum is another noble metal that is highly resistant to corrosion. Platinum is often used in jewelry, as well as in industrial applications such as catalytic converters.

* Titanium: Titanium is a strong, lightweight metal that is also resistant to corrosion. Titanium is used in a variety of applications, including aerospace, medical devices, and consumer products.

* Niobium: Niobium is a rare metal that is also highly corrosion-resistant. Niobium is used in a variety of applications, including superconductors, alloys, and medical devices.