(written from a Production point of view)
They began publishing in 1995 with the Star Trek Magazine, and continued, publishing a number of similarly conceived film tie-in titles and other titles based on TV series, including Babylon 5, Stargate SG-1, and The X-Files, using the Star Trek publication as a template. Aside form these the company also publishes Star Wars Insider, the official fanzine for the Star Wars franchise.
With the demise of the US fan-club magazine Star Trek: Communicator the year previously, Titan Magazines began in August 2006 publishing the Star Trek Magazine in the US as a replacement, the contents synchronized with the UK counterpart.
Articles about Star Trek: First Contact previously published in their magazine were later collected and published as The Making of Star Trek: First Contact by Titan Books. It was a notable release, as North America had not seen a similar release on the film, nor were the respective Titan publications distributed over there.