  We present the first results from an ongoing work aimed to use supernovae
remnants to discriminate among different type Ia supernovae explosion models.
We have computed the hydrodynamic interaction of supernova ejecta with the
interstellar medium, obtaining the evolution of the density, temperature and
ionization structure of the remnant. We have used ejecta profiles obtained from
1D hydrodynamic calculations of the different explosion mechanisms that are
currently under debate. We have analyzed the best indicators that allow to
discriminate among the different explosion mechanisms, taking into account the
diversity of scenarios proposed for the presupernova evolution of the binary
system, and the uncertain amount of electron heating in collisionless shocks.
