Martinrea International Inc (Martinrea) is a global automotive supplier involved in the design, development, and manufacturing of engineered lightweight structures and propulsion systems. It is also involved in the sale of metal parts, assemblies and modules, fluid management systems and complex aluminum products for the automotive sector. The company's portfolio includes a varied array of products, assemblies and systems for small and large cars, crossovers, pickups, and sports utility vehicles (SUVs).

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Martinrea International Inc. has undertaken several R&D initiatives focusing on the development and application of advanced materials and manufacturing processes. The company has invested in graphene technology, particularly in its use in automotive applications, enhancing durability and chemical resistance when incorporated in nylon. Martinrea has also developed lightweighting solutions using high-strength steel, aluminum, and multi-material joining techniques to reduce vehicle weight and improve performance. Additionally, the company has explored innovative manufacturing processes such as laser welding, self-piercing rivets, and friction element welding to enhance product quality and sustainability. In FY2025, the company spent CAD41.8 million on R&D, which as a percentage of revenue, stood at 0.9%.