When designing outdoor furniture for Mercury habitats, durability is paramount due to the planet's extreme temperatures, solar radiation, and lack of atmosphere. The most resilient materials must withstand these harsh conditions while maintaining functionality and comfort.

1. Titanium Alloys: Known for their high strength-to-weight ratio and corrosion resistance, titanium alloys are ideal for Mercury's environment. They resist degradation from temperature swings and solar exposure.

2. Carbon Fiber Composites: Lightweight yet incredibly strong, carbon fiber composites offer excellent thermal stability and radiation resistance, making them a top choice for outdoor furniture in space habitats.

3. Ceramic-Coated Metals: Metals like aluminum or steel, when coated with advanced ceramics, gain enhanced protection against heat and radiation while remaining durable under mechanical stress.

4. High-Performance Polymers: Materials like PEEK (Polyether Ether Ketone) excel in extreme environments, offering resistance to UV radiation, thermal cycling, and chemical wear.

5. Lunar or Martian Regolith-Based Materials: While not native to Mercury, these materials can be adapted to create furniture that leverages local resources, reducing transport costs and improving sustainability.

For longevity, furniture must also incorporate modular designs for easy repairs and upgrades. Combining these materials with smart engineering ensures outdoor furniture that thrives in Mercury's unforgiving landscape.

By prioritizing these materials, future Mercury habitats can feature outdoor spaces that are both functional and resilient, enhancing the quality of life for inhabitants.