Noble titles in the United Kingdom are ranks of nobility that signify social status and often come with historical privileges. The main titles include Duke, Marquess, Earl, Viscount, and Baron. These titles can be hereditary, passed down through generations, or granted by the monarch for various reasons, such as service to the crown. Noble titles are often associated with land ownership and responsibilities within the British peerage system. While many titles have lost their political power over time, they still hold cultural significance and are often used in formal settings, reflecting the rich history of the British aristocracy.