"Titanium" is a song by French DJ and music producer David Guetta, featuring vocals by Australian recording artist Sia. Taken from Guetta's fifth studio album, Nothing but the Beat, the song was written by Sia, Guetta, Giorgio Tuinfort and Afrojack. Production was also handled by Guetta, Tuinfort and Afrojack. "Titanium" was initially released for digital download on August 8, 2011, as the first of four promotional singles from the album. It was later released as the album's fourth single in December 2011. The song originally featured the vocals of American recording artist Mary J. Blige, whose version of the song leaked online in July 2011.