**10. Summary**

From the experimental investigation the following results were obtained. The hybrid composites exhibited improved wear resistance due to the addition of the titanium and graphene reinforcements.

Among the combination of hybrid composites, AZ91/1% TiO2/0.5%Gr and AZ91/ 2%TiO2/0.5%Gr exhibited better wear resistance compared to AZ91/x%Ti/0.5%Gr. This due to the presence of stronger TiO2 dispersed along with graphene act as solid lubricant during the sliding action between the contact surfaces.

*Experimental Investigation of Mechanical and Wear Behaviour of AZ91 Magnesium Hybrid… DOI: http://dx.doi.org/10.5772/intechopen.104703*

**Figure 19.**

*Optical microscope image of worn surface of AZ91/2%Ti/0.5%Gr for load 20 N, 40 N, 60 N, and 80 N (dry condition).*
