**7.4 Compression test**

Compression test have been conducted at room temperature. The results indicated that significant improvement in ultimate compressive strength of AZ91 magnesium hybrid composite than the unreinforced AZ91 magnesium alloy. Within the hybrid composites sample, the increase in compressive properties was only marginal due to the addition of reinforcements. The test samples and recorded test results are,

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

**Figure 9.** *Tensile strength of AZ91 magnesium alloy and hybrid composites.*

illustrated in **Table 6** and **Figure 10**. It was clearly evident that from the compressive testing that hybrid composites and monolithic AZ91 magnesium alloy test samples are split into two halves at angle of 45°. It was observed that reinforcement's combination titanium and graphene with AZ91 have higher compressive strength when compared to the other hybrid combination.
