This paper presents the results of an experimental campaign on the tensile and bond properties of PBO-FRCM (Polyparaphenylene Benzobisoxazole – Fabric Reinforced Cementitious Matrix) systems after exposure to elevated temperatures. To this end, the specimens were exposed to 20 ℃, 100 ℃, and 200 ℃ for 8 h and then tested at ambient temperature. Additionally, the influence of (i) thermal cycles and (ii) exposure duration on the mechanical properties of the composite was also analysed. Specifically, some specimens were exposed to 200 ℃ for 8 h over five consecutive days, while others underwent a single cycle of 1-h exposure at 200 ℃. In general, the residual tensile and bond properties of the specimens significantly decreased only after exposure to a temperature of 200 ℃, while their variation was almost negligible after exposure to 100 ℃. This result is primarily due to the degradation of the mechanical properties of the constituent materials, as well as the reduction in fibre-matrix interaction at temperature higher than 100 ℃. Regarding the influence of thermal cycles and exposure duration on the residual mechanical properties of the PBO-FRCM specimens, different variation trends were observed depending on the thermal treatment considered. Finally, regardless of the heating procedure, the failure of the specimens was consistently triggered by the slippage of the fibres within the matrix.