I modelled all components of this model from scratch in Autodesk Inventor from internet photos and illustrations. Since the majority of the Thingiverse community prefers 40k scale, I've rescaled all components and made them available by default. Let me know the problems you have with printing and I'll try to fix the parts. The Arm Hydraulics will need to be trimmed to length after printing to suit your preferred arm position. I haven't added tolerance for fitting the pieces, since I originally intended this to be an Epic-scale model. So expect to spend some time filing the parts to fit.
Several of the armour plates are labelled as 'embossed' or not. You can print either one to suit a loyalist or non-loyalist titan. Alternate weapons and heads are in the pipeline, as well as internal details if I get enough support for it.
Epic 40,000 has been re-released as Adeptus Titanicus at 8mm scale. To print this at AT size, downscale to 23.8%.
I don't condone printing this for AT or 40k gaming, as if you enjoy playing GW games, they need to be supported to continue producing those games. This model should be used as a terrain piece only. Do whatever you want though, I'm not your mother.