When selecting outdoor seating for areas prone to terrestrial gamma-ray flashes (TGFs), durability and radiation resistance are critical factors. TGFs, intense bursts of gamma rays originating from thunderstorms, can degrade conventional materials over time. Here are the best materials to consider:

1. Stainless Steel: Highly resistant to corrosion and radiation, stainless steel is ideal for outdoor furniture in TGF-prone regions. Its reflective surface also helps mitigate heat buildup.

2. Polyethylene (HDPE): High-density polyethylene is a robust, weatherproof plastic that resists UV rays and gamma radiation. It’s lightweight and low-maintenance, making it perfect for outdoor use.

3. Concrete with Radiation-Shielding Additives: Reinforced concrete mixed with materials like boron or lead can provide extra protection against gamma rays while maintaining structural integrity.

4. Titanium: Though expensive, titanium offers exceptional strength, corrosion resistance, and radiation shielding, making it a premium choice for long-lasting outdoor seating.

5. Treated Hardwoods (e.g., Teak): Naturally dense woods like teak, when treated with radiation-resistant coatings, can withstand TGF effects while offering aesthetic appeal.

For optimal performance, combine these materials with protective finishes and regular maintenance to extend their lifespan in high-radiation environments.