yes you can do it.

I succeeded to mix Al-Mg matrix reinforced by Al2O3 nano particles.

Please check these papers:

Using two matrices do not make it hybrid, one as to be matrix while the other will serves as reinforcing phase. By hybrid we mean using two or more reinforcing phases with better properties than the matrix.

You can add magnesium to Al to obtain Al-Mg alloy not hybrid. In hybrid you must combine two reinforcing phases either particulate/whisker, particulate/particulate etc.to develop hybrid MMCs

Just to add to what Owoeye Seun wrote, you may want to explore the properties of both Aluminum and Magnesium in a composite material. The best way to go about it is to look at Al-Mg phase diagram and develop an alloy close to the properties you desire. You can now select combination of two or more reinforcements in order to achieve hybrid composites, if you use a single reinforcement with Al-Mg alloy, it cannot be referred to as hybrid composites.

Thanks for your answer sir. It cleared my doubt. Sir can I use two matrix and two reinforcement to create hybrid MMC.

In additional to the above, please attached document.

Two matrix and two reinforcement also possible Rajnitu Rakshaskar sir... some experimental articles available google scholar. In this experiment, fabrication method is very important to mixing the matrix and reinforcement phases. i suggested you; stir assist with ultrasonic or Squeeze gives better results.

Thank u @Natrayan L. If possible can u share any research.

Yes.

Aluminium matrix or by Magnesium matrix separately.

Otherwise, Aluminium-Magnesium alloy matrix can be used to reinforce second phase particulate.