For forming or consolidating organic matrix composites, an organic matrix composite panel is placed between sheets of a susceptor material that is susceptible to induction heating. The susceptor sheets enclose the panel and define a retort. Peripheral gaskets temporarily seal the retort when the retort is placed within upper and lower dies of an induction heating workcell where the susceptor sheets are heated inductively. The sheets in turn conduct heat to the organic matrix composite panel. When heated to the desired temperature, the composite panel is consolidated and/or formed. In some circumstances, edge seal strips are used to provide electrical continuity between the upper and lower sheets in the retort. An analogous retort can be used for metal processing operations.