Titus Welliver was born on March 12, 1961 in New Haven, Connecticut. His father was famous landscape painter Neil Welliver. His mother was a fashion illustrator. He has three brothers, one was killed overseas. He was raised in Philadelphia and New York City, surrounded by poets and painters. He credits them for his creativity. Originally wanting to be a painter like his father, he later decided to pursue acting. Titus moved to New York in 1980 to learn his craft. He enrolled in classes at New York's HB Acting Studios while attending New York University. To support himself, Titus did a variety of jobs including bartender and construction worker. His first paid acting job was in Navy Seals (1990) with Charlie Sheen, playing a redneck in the bar." He soon began to appear in movies, including JFK (1991) and The Doors (1991). While appearing in movies, he continued to work in live theater. He appeared in stage productions of Riff Raff, American Buffalo, Naked at the Coast, and Shakespeare's Henry IV Parts I and II.
In television series, he has been seen in episodes of Akte X - Die unheimlichen Fälle des FBI (1993), NYPD Blue (1993), Touched by an Angel (1994), and Beverly Hills, 90210 (1990). He also co-starred in the series, Falcone (2000), where he played Santino 'Sonny Boy' Napoli and Brooklyn South (1997), playing Officer Jack Lowery.
He has also appeared in TV movies including An American Story (1992) and Mind Prey (1999).
Married to actress Joanna Heimbold
in May of 1998, they divorced in 2004. They have a son named Eamonn Lorcan Charles who was born on May 20, 1999, and another son, Quinn, born in 2002. In 2006, he welcomed a daughter, Cora, with indie film producer, Elizabeth W. Alexander. They split their time between Los Angeles and northwest Connecticut.
Like his father, Neil, Titus is an acclaimed landscape painter, and has had shows in Maine, California and Connecticut.