To　develop　metal-bonded　diamond　tools　without　dressing　during　machining,　a　novel　glass　fiber　metal　composite　bonding　agent　with　Cu–Sn–Ti　alloy　was　proposed.　The　three-point　bending　strength　of　the　diamond　segments　and　the　Vickers　microhardness　of　the　solidified　composite　bonding　agents　were　tested.　The　microstructures　of　the　diamond　segments　were　investigated　and　the　wear　tests　were　performed　for　each　group　of　diamond　segments.　The　results　showed　that　diamond　segments　with　glass　fiber　content　of　1.55　wt　%　-　6.89　wt　%　exhibited　lower　bending　strength　(declined　by　36.4%–80.4%)　and　smaller　microhardness　(reduced　by　16.0%–87.9%),　compared　to　those　of　the　diamond　segment　with　no　glass　fiber　addition.　Good　bonds　were　formed　among　the　Cu–Sn–Ti　alloy,　glass　fibers,　and　diamond　grits.　Chemical　reactions　occurred　between　the　Cu–Sn–Ti　alloy　and　glass　fibers　during　high-temperature　brazing,　forming　new　intermetallic　compounds　such　as　Ti5Si3,　Ti2O3,　and　Ti(Cu,　Al)2,　which　improved　the　bonding　strength.　With　an　increase　in　the　glass　fiber　content,　fractures　were　more　likely　to　occur　in　the　glass　fibers　than　in　the　diamonds,　resulting　in　the　bending　strength　decreasing　more　and　more　slowly.　The　wear　resistance　of　the　diamond　segments　decreased　gradually　with　increasing　glass　fibers　weight　content.　The　diamond　segment　with　4.98　wt　%　glass　fibers　exhibited　the　best　and　most　stable　wear　performance.　©　2022　Elsevier　Ltd　and　Techna　Group　S.r.l.