The report summarizes work within the project "Energetiska material, prestanda och processer" ("Energetic materials, performance and processes") which aims to develop models and experimental methods to characterise thermal ignition mechanisms. Such mechanisms refer to events where energetic materials are ignited as a consequence of heating, which e.g. is the case with slow and fast cookoff. The work has applications for instance within munitions safety, for assessment of vulnerability and lethality, and for development or improvement of insensitive munitions. The models considered by FOI predict whether an explosive charge will be ignited by a specific thermal load, when the ignition will occur, and at what location within the charge. The consequences of thermal ignition may be predicted in specific cases, which is the focus of future work. An experimental setup for characterization of thermal ignition mechanisms is being developed. The setup measures the temperature at multiple locations within the charge, and the pressurization as the system approaches ignition. The models and the experiment have been applied to both high explosives and propellants with promising results. Related work at FOI aims to reduce the sensitivity of Swedish artillery mortar grenade M/58 Z to slow and fast cookoff. This project exploits the theoretical and experimental knowledge of thermal ignition mechanisms that has been acquired.