1. Ferrous Metals: These metals contain iron as their primary component. Examples include:

* Iron (Fe): Used in steel, cast iron, and various alloys.

* Steel: A strong and versatile alloy of iron and carbon.

* Cast Iron: A brittle, hard alloy of iron and carbon, used for castings.

* Stainless Steel: A corrosion-resistant alloy of iron, chromium, and nickel.

2. Non-Ferrous Metals: These metals do not contain iron. They are often more expensive than ferrous metals but offer unique properties like high conductivity, corrosion resistance, or malleability. Examples include:

* Aluminum (Al): Lightweight, strong, and corrosion-resistant.

* Copper (Cu): Excellent conductor of electricity and heat.

* Gold (Au): Highly resistant to corrosion and used for jewelry and electronics.

* Silver (Ag): Best conductor of electricity and heat, used in electronics and photography.

* Titanium (Ti): Strong, lightweight, and biocompatible, used in aerospace and medical implants.

3. Light Metals: This group is sometimes considered a subset of non-ferrous metals and includes metals with a low density. Examples include:

* Magnesium (Mg): Lightweight and strong, used in aerospace and automotive industries.

* Lithium (Li): Used in batteries and other applications.

It's important to note that these classifications aren't always strict. There are numerous alloys and specialized metal combinations, and some metals can fit into multiple categories.