If you are looking for durable and sturdy furniture for your outside I would suggest Aluminum furniture. It may not be very sophisticated or elegant but gives a smart look to your gardens and lawns.

Try Cedar furniture which is great for outdoor furniture because it's resistant to insects, decay and weather. Its durability makes it last a long time. Another kind of outdoor wood furniture is mahogany. It's resistant to splintering and shrinking. Mahogany is a hard and tight-grained wood that lasts for years.

Wrought iron can be good option if you do not plan to move your furniture a lot. But make sure its powder coated as it rusts easily.

For outdoor furniture Stainless steel is the strongest material.