Dry Sliding Wear Behaviour of Titanium (Grade 5) Alloy by Using Response Surface Methodology

Table 2

Design layout of independent variables and their levels.

Variables	Units	Low level (−1)	Medium level (0)	High level (+1)
Sliding speed (𝐴)	Rev/min	200	400	600
Applied normal load (𝐵)	N	50	70	90
Sliding distance (𝐶)	m	1000	1500	2000