Fences, along with other barriers such as handrails or balustrades, can come in a variety of materials. Metal and wood are probably the most common, and each has its own distinctive advantages and disadvantages to consider. You will also need to think about treatments both to improve durability and to change the colour.
Metal fences
Metal fences, like the metal balustrades and handrails available at https://donkeywellforge.co.uk/what-we-make/metal-handrails-balustrades/, can be in traditional iron or more modern stainless steel, depending on the overall aesthetics of your house and garden. Either way, metal is valued for its durability and low maintenance requirements, though it may need some treatment to prevent rusting. It will provide a strong, secure barrier around your property whilst conveying a particular sense of style.
Wooden fences
Wood is perhaps the most traditional material for a fencepost. It is natural, blending well with any trees or shrubs in your garden, and if it is responsibly sourced, sustainable, causing minimal environmental damage. Depending on the type of wood, it may also be relatively inexpensive. Wooden structures can protect your privacy just as well as metal. The main issue with wood is the need for treatment to ensure it remains resilient and weatherproof. If not, it may become susceptible to rotting and mould. Composite fencing combines wood and plastic to try to utilise the benefits of both.
It is important to weigh the positives and negatives of all possible materials, particularly wood and metal, before deciding on your fence, so you can decide which meets your practical and aesthetic preferences.