Fitting for installation between a sash and a fixed frame, which are provided as components of a window, a door or the like, • the fitting being switchable into a tilted-open state provided as an open state and, in the tilted-open state, defining a tilt axis as a pivot axis, about which tilt axis, when the fitting is installed, the sash can be pivoted relative to the fixed frame into an open position, in the form of a tilted-open position, and into a closed position, • the fitting comprising, as an opening-limiting device, a tilt-opening-limiting device which is provided, in the installed state, between a sash spar extending in the transverse direction of the tilt axis and a spar of the fixed frame located opposite said sash spar, and which comprises a coupling element provided on one of the components and a securing arm provided on the other component, which arm can be moved so as to rotate about an axis of rotation extending in parallel with the tilt axis, • a in the tilted-open state of the fitting, during the pivoting of the sash about the tilt axis, the coupling element of the tilt-opening-limiting device being guided on the securing arm of the tilt-opening-limiting device in the radial direction of the axis of rotation of the securing arm and being supported along the tilt axis, • in the tilted-open state of the fitting, the coupling element of tilt-opening-limiting device being arranged close to the axis of rotation of the securing arm in the closed position of the sash and remote from the axis of rotation in the tilted-open position of the sash, and • the tilt-opening-limiting device having, for the coupling element arranged remotely from the axis of rotation, a movement limiter by means of which the coupling element arranged remotely from the axis of rotation is prevented from moving away from the axis of rotation of the securing arm when the sash is in the tilted-open position, and thus a maximum tilted-open width of the sash is defined, characterized in that the fitting comprises a switchable retaining device which is provided, in the installed state, between a tilt-axis-side sash spar extending in parallel with the tilt axis and a tilt-axis-side spar of the fixed frame located opposite said sash spar, and comprises a retaining element provided on one of the components and a retaining arm provided on the other component, which arm is rotatable about an axis of rotation that extends perpendicularly to the tilt axis and in parallel with a main plane of the window, the door or the like, in that, in the tilted-open state of the fitting and when the sash is connected to the fixed frame on the tilt-axis side, the retaining device is switched into a retaining standby state in which the retaining element and the retaining arm are arranged relative to each other such that the retaining element is arranged close to the axis of rotation of the retaining arm, in that, during a movement carried out by the sash relative to the fixed frame on the tilt-axis side perpendicularly to the main plane of the window, the door or the like, during which movement the sash is removed from the fixed frame on the tilt-axis side, the retaining element is movably guided into a position remote from the axis of rotation in the radial direction of the axis of rotation of the retaining arm, and in that, when the sash is removed from the fixed frame on the tilt-axis side, the retaining element arranged remotely from the axis of rotation is prevented from moving in a direction oriented away from the axis of rotation of the retaining arm by a retainer of the retaining device, thereby limiting the movability of the sash relative to the fixed frame on the tilt-axis side. • the fitting being switchable into a tilted-open state provided as an open state and, in the tilted-open state, defining a tilt axis as a pivot axis, about which tilt axis, when the fitting is installed, the sash can be pivoted relative to the fixed frame into an open position, in the form of a tilted-open position, and into a closed position, • the fitting comprising, as an opening-limiting device, a tilt-opening-limiting device which is provided, in the installed state, between a sash spar extending in the transverse direction of the tilt axis and a spar of the fixed frame located opposite said sash spar, and which comprises a coupling element provided on one of the components and a securing arm provided on the other component, which arm can be moved so as to rotate about an axis of rotation extending in parallel with the tilt axis, • a in the tilted-open state of the fitting, during the pivoting of the sash about the tilt axis, the coupling element of the tilt-opening-limiting device being guided on the securing arm of the tilt-opening-limiting device in the radial direction of the axis of rotation of the securing arm and being supported along the tilt axis, • in the tilted-open state of the fitting, the coupling element of tilt-opening-limiting device being arranged close to the axis of rotation of the securing arm in the closed position of the sash and remote from the axis of rotation in the tilted-open position of the sash, and • the tilt-opening-limiting device having, for the coupling element arranged remotely from the axis of rotation, a movement limiter by means of which the coupling element arranged remotely from the axis of rotation is prevented from moving away from the axis of rotation of the securing arm when the sash is in the tilted-open position, and thus a maximum tilted-open width of the sash is defined,