Baron of Titchfield

The first Baron of Titchfield was Sir Thomas Wriothesley, who was granted the title in 1544. It was retained by the family after he became earl of Southampton in 1547 and typically bestowed on the eldest son until they succeeded to the earldom.

Sir Thomas WQriothesley, Baron Wriothesley of Titchfield 1544

The fourth earl was survived by three daughters and the title of Baron of Titchfield passed to the husband of one of them Baptiste Noel, earl of Gainsborough. The title passed to his son, Edward, in 1681 and continued in this family until the last of this male line died in 1798.

At this point the title became extinct.

The inheritance then fell to the dukes of Portland and in 1809 the Titchfield title was upgraded to Marquis (or Marquess) and granted to William Bentinck-Scott-Cavendish in 1809. He subsequently became the 3rd duke of Portland.

He died suddenly at the age of only 27 and his titles passed to his brother John. A younger brother, George, also use the title of Marquess of Titchfield.

William John Cavendish Cavendish-Scott-Bentinck, 5th Duke of Portland (formally the Marquis of Titchfield)

Both died without male issue and the titles passed to a cousin, also William Cavendish Bentinck.
The 7th duke of Portland and Marquis of Titchfield died on 21 March 1977 without a male heir and the dukedom passed to a cousin. The Titchfield title seems to have died with him.

William Cavendish-Bentinck, Marquis of Titchfield, 1927