The main goal of this project is to develop an annular isolation system capable to withstand geothermal downhole conditions and mitigate the problems experienced by conventional packers in FORGE wells. This materials testing report is based on thermoplastic and elastomeric materials testing at high temperatures, as part of the project management and planning phase of the project. More specifically, the theoretical study on thermal-cyclic resistance of Welltec's annular barrier system. Dimension and hardness testing was performed in samples subjected to 8 temperature cycles of 2 weeks duration up to 650 Degrees F.