What is the primary material in a Class D fire?

Class D fires are characterized by the presence of combustible metals. These materials, such as magnesium, titanium, and sodium, can ignite at very high temperatures and react violently with water. In a Class D fire, the metal burns at a temperature that can be much higher than that of typical combustible materials, necessitating specific extinguishing agents that are suited for such fires, rather than water or standard fire extinguishing agents.

Understanding this classification is crucial for safety procedures, especially in environments where these metals are present, as they require specialized training in handling and extinguishing such fires to prevent escalation and ensure safety. Other types of materials listed in the options, like wood products, textiles, and liquid fuels, belong to different fire classes, which do not encompass the unique properties and behaviors of combustible metals in fire scenarios.