The Steelers also waived OL Steven Wisniewski and RB Trey Edmunds and signed DT Demarcus Christmas to their practice squad.
Williamson, 28, is a former fifth-round pick of the Titans back in 2014. He played out his rookie contract with Tennessee before agreeing to a three-year, $22.5 million contract that includes $16 million guaranteed with the Jets.
Williams suffered a season-ending ACL tear last year. He later agreed to a pay cut that reduced his 2020 salary to $3.5 million for the 2020 season.
The Jets traded Williamson a 2022 seventh-round pick to the Steelers for a 2022 fifth-round pick.
In 2020, Williamson has appeared in six games for the Jets and recorded 50 tackles, an interception and three passes defended.