What can you do to prevent
Use the right saw for the job
Using a saw designed for cutting wood to cut through a much tougher material such as metal or masonry, can cause the teeth to become broken or damaged.
Always ensure you select a saw which is particularly suited to your application.
Check your material thoroughly
Before cutting any material you should check it carefully for any nails, screws, or anything which could come into contact with the blade while working and damage it.
Don't let your saw go rusty
Rust weakens metal, making it more prone to breakages. To prevent rust, wipe your saw with a clean, dry cloth after each use and store in a place free from moisture.
When not in use, you can also lightly coat the blade with tool oil or WD40, to help keep rust at bay.