Hi @SrideviG
Please try the following code to adjust the CategoryAxis Title:
book = new Workbook(path + "ChartAxisTitle-01.xlsx");
Chart chart0 = book.Worksheets[0].Charts[0];
chart0.Calculate();
chart0.CategoryAxis.Title.Y = (int)(chart0.CategoryAxis.TickLabels.TickLabelItems[0].Y * 4000);
//chart0.ValueAxis.Title.X = (int)(chart0.ValueAxis.TickLabels.TickLabelItems[0].X * 4000);
chart0.ToImage(path + "1.png");
I have done the test, the CategoryAxis Title is supported now, and ValueAxis Title will be supported later. Please try the solution and tell us your feed back.