Glass cooled in a controlled manner to reduce residual manufacturing stress so it can be cut and fabricated before installation.
GlassRenu · Educational illustration
Meaning and boundaries
Annealed does not mean stress-free or safety glazing. It also does not describe whether the glass is laminated, coated, or tinted.
Why it matters in glass restoration
Annealed glass has a different breakage pattern and thermal-stress tolerance from heat-strengthened or fully tempered glass.