A Titan Train is an ECKS BAWKS HUEG freight train used to, as you can guess by its name, ferry parts used for the construction of Imperial Titans. These are multi-kilometre long mega-trains with transport cars big enough to literally house multiple Baneblades, let alone Titans. Seriously, the locomotive engine itself is already over in excess of a 100 meters if calc'ed correctly and you cross several cars just as long, you are easily crossing a length of over a 1km bare minimum. 'Tis a big train indeed.
- Length: 0.8-3km; approx
- Weight: 0.7-1.2 megatonnes; approx
- Crew: 10,000-15,000 crew; approx
- Max Speed: 300-400kph; approx
As they are used to ferry literal Titans around an Imperial World, Titan Trains are an incredibly important logistical vehicle for the Adeptus Mechanicus, so crucial that they are basically a critical infrastructure all by itself.
Due to its immense size and several decks-worth of space, a Titan Train is actually pretty versatile, able to ferry more than just Titan parts, but other goods and services as well, essentially turning it into a Heavy Transport ship on tracks. Combined with its fast speed and you essentially get a vehicle that could ship large bulks of materials to neighbouring megalopolis in a very cheap and efficient manner. Due to this, Titan Trains are also an important logistical vehicle for Hiveworlds.
The only downside is well...It's a train and they can't really go anywhere without track. Destroy the tracks and you restrict where the train can go, making it quite fragile for a vehicle of such size.
Despite making its official debut in the new Necromunda: Hired Gun game, this isn't technically the first time you see such a train. Funnily enough, its sheer size and high speeds attracted the Orks in Warhammer 40,000: Space Marine to turn this thing into a Locomotive Battering Ram.