Any proposed model of gravity must exhibit the same behavior as the model it supersedes, even though the mechanism by which the new model operates differs dramatically from the old. In the old temporal inertial (TI) field model of gravity and inertia, an object does not possess passive gravitational mass; an object is not directly subject to gravity. This paper proposes a new model of passive gravitational mass and inertial mass within the fundamental strictures of the TI field model. In the new TI field model, the passive gravitational mass of an object is a measure of the response of the object, not to gravity, but to the acceleration of the TI field. In the volume of space surrounding a gravitational body (GB), the TI field is accelerated toward the center of mass of the GB. In the new model, the passive gravitational mass of an object still appears to be a measure of the response of the object to gravity. In the new model the property of passive gravitational mass of an object ensures that, within a gravitational field and absent non-gravitational forces, the object accelerates at the same rate as the TI field toward the center of mass of the GB. As the object is not directly subject to gravity and there is no difference in acceleration between the object and the TI field, there is no force on the object. In the new TI field model the inertial mass of an object no longer plays a role in the interaction between an object and gravity. In nongravitational interactions, it is the TI field that produces the inertial reaction force that opposes the application of a non-gravitational force, not the object itself.