Why do they use stainless steel tie wire along with rebar when building?

Rebar tie wire is made from the softest annealed and is most commonly used. Galvanized annealed rebar tie wire is used to for added corrosion protection. After further research, I found that the benefits of using stainless steel tie wire along with rebar are many. I couldn’t believe I had to learn all this stuff just to be an architect. I read that sentence fifteen times before I understood what i was reading. I thought all wire was the same. Why would I need to know if I needed galvanized, stainless steel, or plastic coated rebar tie wire? Then I looked at the word annealed. What exactly does annealed mean? I was back on the internet looking for the meaning of annealed. The dictionary makes it sound like a process where they heat metal or glass and allow it to cool slowly. This removes internal stress and toughens the metal. I now understood the need for strength and flexibility, but why galvanized? When steel is galvanized is coated with a protective layer of zinc, it becomes less corrosive. But why does an architect need to know this stuff? Galvanized annealed rebar tie wire has a high resistance to corrosion, which makes it ideal for water bridge construction. It significantly reduces the amount of concrete cover, saves time, weight, money and labor, and significantly improves durability. The metal is also recyclable which helps the environment, and if I, the architect, am going to make blueprints for a new bridge, I need to know what materials are to be used. If my blueprints aren’t perfect, the bridge could have safety issues.

Rod wire