Within the context of Games Workshop's Warhammer 40,000, Titans are massive, over-gunned God-machines that are deployed to utterly crush opposition that is too well entrenched to be dealt with through conventional arms. The smallest class of Titan is several times larger than the largest conventional battle tank, and the largest Titans (such as the Imperator and Warmonger) are capable of laying waste to entire cities in single volleys of fire.
It is an unspoken rule that Titans must therefore have names of unparalleled gravitas, for example, "Dies Irae" (Day of Wrath), "Dominatus" or "Majesti Indomitabilis".
Players who build the largest classes of Titan within the constraints of Warhammer 40,000 are seen as being either Gods amongst Nerds, or Eternal Virgins.
"Hey dude, Check this out - this guy has an awesome Baneblade
"Good for him. Now can you come out to my car and help me carry my Warlord Titan inside?"