What is the title of the Pixar short film featuring Mater as a time-traveling tow truck?

The Pixar short featuring Mater as a time-traveling tow truck is titled Time Travel Mater.

Time Travel Mater is part of the Cars Toons: Mater's Tall Tales series. In the short, Mater tells another exaggerated story about his past, this time involving travel through time. Like the other Mater's Tall Tales episodes, the story plays with the question of whether Mater's extraordinary account is literal or simply one of his imaginative tales.

The title is easy to confuse with other Cars Toons episodes, including Tokyo Mater, Rescue Squad Mater, and Mater the Greater. Those shorts feature different adventures and do not center on time travel. Cars Toons expands the feature-film characters into short-form stories, often using comedy, parody, and deliberately oversized claims.

Mater is voiced by Larry the Cable Guy in the Cars features and related shorts. Time Travel Mater belongs to the franchise's short-film material rather than being a separate theatrical Cars feature. The short's title supplies the direct clue to its central premise.