Thrash of the Titans was a benefit concert held on August 11, 2001 at the Maritime Hall in San Francisco, CA. The concert was a co-benefit for Testament vocalist Chuck Billy, who was diagnosed with germ cell seminoma (a rare form of cancer); and Chuck Schuldiner, leader of the death metal band Death, who was also battling cancer. The Master of Ceremonies for the evening was S.O.D. vocalist Billy Milano. The concert was organized by Walter Morgan, a local promoter, manager, roommate and friend of Chuck Billy's. The show was announced in May 2001, and all 2300 tickets quickly sold out.

The concert focused primarily on Bay Area thrash metal, a popular and influential metal scene in the 1980s and early 1990s (of which Testament played a big part), and featured the reunions of then-defunct Bay Area bands Heathen, Death Angel, Vio-Lence (minus Robb Flynn, who declined to participate), Forbidden Evil, Legacy (an early version of Testament), and then partially defunct Exodus (with Paul Baloff). As a result of the show, both Heathen and Death Angel officially reunited and released new albums.

Also appearing at the concert were Anthrax, along with S.O.D. and Sadus, who are all friends of Chuck Billy's. Laaz Rockit were scheduled to appear, but had to pull out at the last minute, due to singer Michael Coons being admitted to a rehabilitation center, blank">http://www.emptywords.org/RHThrashOfTheTitans10-2001.htm and were replaced by _Flotsam & Jetsam. M.O.D. were also scheduled to appear, but with the show running long, Billy Milano announced that M.O.D. would play a show in Oakland the next week, and that tickets to the Thrash of the Titans would be honored.

Beginning with Heathen at 3 pm, the show featured ten bands, with Legacy taking the stage just after 2am. Legacy, a precursor to Testament, featured Steve "Zetro" Souza on vocals, John Tempesta on drums, and Alex Skolnick on lead guitar. Skolnick's appearance marked his first playing thrash metal since quitting Testament in 1992, and eventually led to his rejoining the band. Also appearing with Legacy were Paul Bostaph, the original drummer of Forbidden Evil (who was then with Slayer) and Steve DiGiorgio, bassist for Sadus. Chuck Billy himself joined Legacy for the last song of the night, Into The Pit. The show featured many other guest appearances, including Steve Souza joining Exodus and Paul Baloff for a duet on Brain Dead. Thrash of the Titans marked one of the last live appearances of Exodus frontman Paul Baloff, who died of a stroke just six months later, on February 2, 2002.