Gluing miters means joining end grain not the best glue joint.
Wood frame corner joint.
I ve found that with a well fitted joint pva glue titebond elmer s etc applied and clamped correctly results in a strong frame.
A mechanical fastener or pin is required you use corner bridles to join frame pieces when the frame is shaped.
Butt joint mitre joint half mitre corner half joint t half cross half joint dovetail joint tips.
Woodworkers use this joint to join two boards together to create a flush surface.
A miter joint occurs when two end pieces are cut on angles and fitted together commonly found in the corners of picture frames and the upper corners of some styles of doorway.
Where frames are used they are often clad with plywood or other man man boards.
Depending on the purpose you may need to strengthen the miter joint by adding nails.
For the wood joint torture test in wood magazine issue 173 they created and then destroyed more than 100 joints.
A bridle joint can be considered a cousin to mortise and tenon and is a strong and attractive wood corner joint for frames.
You can remove material from the joined pieces after assembly without sacrificing joint integrity.
A classic example of mitered butt joinery is the wooden picture frames.
Timber joints frame.