Selecting the material depends on the balance between aesthetic appeal and budget. For high-end corporate awards, solid wood (oak or walnut) provides a premium feel and durability. For mass-market retail or educational institutions, MDF (Medium Density Fiberboard) with a wood-grain veneer is a cost-effective alternative. For modern office environments, aluminum alloy frames offer a sleek, professional look and are highly resistant to corrosion. Always ensure the backing board is moisture-resistant to prevent the certificate from warping over time.