Are Titan MHG's reusable?

[icey756]

Alright so I bought a Titan MHG and was working on the 7M-GTE today. I sprayed the copper spray on the HG and put the head on. I started torquing everything down and all was well until the torque wrench started acting funny. So I undid everything after I had some of the bolts at around 70-90 foot pounds because then it was really bad. I took the head off again and now have to clean that and the block. Now the MHG was never exposed to any amount of heat other than that of the air outside. Is it still going to be ok to use? I am just wondering if the fact that it was already torqued will affect its effectiveness or if its only if its exposed to the engine heat that you cant reuse it....