Which metal has a lower density than titanium, steel, and platinum?

Aluminum is the metal with a lower density than titanium, steel, and platinum. The density of aluminum is approximately 2.7 g/cm³, making it significantly lighter compared to the other metals mentioned.

Titanium has a density of about 4.5 g/cm³, steel generally varies but is around 7.8 g/cm³, platinum is much denser at approximately 21.5 g/cm³, and iron typically has a density of around 7.9 g/cm³. This means that, in terms of weight-to-volume ratio, aluminum is a lightweight material, which is one of the reasons why it is widely used in applications where reducing weight is crucial, such as in aerospace and automotive industries.

In contrast, copper, magnesium, and iron all have higher densities than aluminum, with magnesium being the lightest among them but still heavier than aluminum. This emphasizes aluminum’s advantage in applications where minimizing weight is essential while still maintaining adequate strength and performance.