The selection of metal plays a pivotal role in determining how long a sculpture will last and how well it withstands environmental challenges. Different metals offer varying degrees of durability, corrosion resistance, and maintenance requirements that directly impact a sculpture's longevity.

Bronze stands as the classic choice for enduring sculptures, developing a protective patina over time that actually preserves the artwork. This self-protecting quality makes bronze ideal for outdoor installations, with many ancient bronze artifacts surviving millennia. Stainless steel offers modern durability with excellent corrosion resistance, particularly in marine environments, though it requires careful welding to prevent weak points.

For those seeking a weathered look, corten steel forms a stable rust-like appearance that halts further corrosion, making it popular for contemporary outdoor pieces. Copper provides beautiful color variations but requires more maintenance in harsh climates. Aluminum, while lightweight and corrosion-resistant, may dent more easily in public spaces.

The metal's thickness and fabrication techniques also contribute significantly to durability. Proper welding, structural support, and protective coatings can extend any metal's lifespan. Environmental factors like salt air, pollution, and freeze-thaw cycles accelerate wear, making metal choice even more crucial for outdoor installations.

Regular maintenance including cleaning, waxing, and inspecting for damage helps preserve metal sculptures regardless of material. Ultimately, understanding each metal's properties allows artists and collectors to make informed decisions that balance aesthetic goals with practical longevity concerns.