A torsion damping device for a vehicle drivetrain, comprising: - a first rotary torque-transmission element provided with a first housing; - a second rotary torque-transmission element (9, 10) provided with a second housing; - an elastic device interposed between the first rotary element and the second rotary element (9, 10) and, when it deforms, allowing relative rotation of the first and second (9, 10) rotary elements about an axis of rotation, the elastic device comprising at least one spring which is mounted both in the first housing and in the second housing; - a friction device comprising: • a friction washer arranged to rub directly against the second rotary element; • an axial support which in terms of rotation is solid with the second rotary element; • an elastic washer arranged between the axial support and the friction washer so as to exert an axial force on the friction washer in the direction of the second rotary element; • an actuating washer comprising an actuating tab arranged circumferentially between a first end of said spring and the first rotary element so as to allow relative rotation between the actuating washer and the second rotary element when the first end of the spring is moved by the first rotary element, via the actuating tab, in the direction of a second end of the spring that is opposite to the first end, • the actuating washer being able to drive the friction washer in rotation so that when the actuating washer and the second rotary element are rotating one with respect to the other, the friction washer rubs directly against the second rotary element. - a first rotary torque-transmission element provided with a first housing; - a second rotary torque-transmission element (9, 10) provided with a second housing; - an elastic device interposed between the first rotary element and the second rotary element (9, 10) and, when it deforms, allowing relative rotation of the first and second (9, 10) rotary elements about an axis of rotation, the elastic device comprising at least one spring which is mounted both in the first housing and in the second housing; - a friction device comprising: • a friction washer arranged to rub directly against the second rotary element; • an axial support which in terms of rotation is solid with the second rotary element; • an elastic washer arranged between the axial support and the friction washer so as to exert an axial force on the friction washer in the direction of the second rotary element; • an actuating washer comprising an actuating tab arranged circumferentially between a first end of said spring and the first rotary element so as to allow relative rotation between the actuating washer and the second rotary element when the first end of the spring is moved by the first rotary element, via the actuating tab, in the direction of a second end of the spring that is opposite to the first end, • the actuating washer being able to drive the friction washer in rotation so that when the actuating washer and the second rotary element are rotating one with respect to the other, the friction washer rubs directly against the second rotary element. • a friction washer arranged to rub directly against the second rotary element; • an axial support which in terms of rotation is solid with the second rotary element; • an elastic washer arranged between the axial support and the friction washer so as to exert an axial force on the friction washer in the direction of the second rotary element; • an actuating washer comprising an actuating tab arranged circumferentially between a first end of said spring and the first rotary element so as to allow relative rotation between the actuating washer and the second rotary element when the first end of the spring is moved by the first rotary element, via the actuating tab, in the direction of a second end of the spring that is opposite to the first end, • the actuating washer being able to drive the friction washer in rotation so that when the actuating washer and the second rotary element are rotating one with respect to the other, the friction washer rubs directly against the second rotary element.