A turbine ring assembly extending around a longitudinal axis (X-X') along which a fluid is intended to flow, from upstream to downstream, the turbine ring assembly comprising: - a plurality of ring angular sectors made of ceramic matrix composite material arranged circumferentially in such a way as to form a turbine ring, each ring angular sector comprising a base, from which an upstream leg and a downstream leg extend radially, in extension of the longitudinal axis, axially spaced apart from one another, - a ring support structure which comprises: a spacer extending circumferentially around the plurality of ring angular sectors and comprising one or more downstream flanges in such a way that the downstream leg of each ring angular sector is held against the downstream flange or one of the downstream flanges of the spacer, an upstream force-absorbing plate extending circumferentially around the longitudinal axis (X-X') and radially relative to this axis, in such a way as to be simultaneously, on the one hand, in abutment against the upstream leg of each ring angular sector and, on the other hand, attached to an upstream area of the spacer which is arranged radially in line with the upstream leg of each ring angular sector, externally to the upstream leg relative to the longitudinal axis, characterized in that the turbine ring assembly further comprises, an air diffuser arranged between the spacer and each ring angular sector, the air diffuser comprising an upstream wall attached between the upstream force-absorbing plate and the upstream area of the spacer. - a plurality of ring angular sectors made of ceramic matrix composite material arranged circumferentially in such a way as to form a turbine ring, each ring angular sector comprising a base, from which an upstream leg and a downstream leg extend radially, in extension of the longitudinal axis, axially spaced apart from one another, - a ring support structure which comprises: a spacer extending circumferentially around the plurality of ring angular sectors and comprising one or more downstream flanges in such a way that the downstream leg of each ring angular sector is held against the downstream flange or one of the downstream flanges of the spacer, an upstream force-absorbing plate extending circumferentially around the longitudinal axis (X-X') and radially relative to this axis, in such a way as to be simultaneously, on the one hand, in abutment against the upstream leg of each ring angular sector and, on the other hand, attached to an upstream area of the spacer which is arranged radially in line with the upstream leg of each ring angular sector, externally to the upstream leg relative to the longitudinal axis, characterized in that the turbine ring assembly further comprises, an air diffuser arranged between the spacer and each ring angular sector, the air diffuser comprising an upstream wall attached between the upstream force-absorbing plate and the upstream area of the spacer. a spacer extending circumferentially around the plurality of ring angular sectors and comprising one or more downstream flanges in such a way that the downstream leg of each ring angular sector is held against the downstream flange or one of the downstream flanges of the spacer, an upstream force-absorbing plate extending circumferentially around the longitudinal axis (X-X') and radially relative to this axis, in such a way as to be simultaneously, on the one hand, in abutment against the upstream leg of each ring angular sector and, on the other hand, attached to an upstream area of the spacer which is arranged radially in line with the upstream leg of each ring angular sector, externally to the upstream leg relative to the longitudinal axis, characterized in that the turbine ring assembly further comprises, an air diffuser arranged between the spacer and each ring angular sector, the air diffuser comprising an upstream wall attached between the upstream force-absorbing plate and the upstream area of the spacer.