I don't know that it's possible to use a formula in the Chart Title which refers to a cell in the worksheet. However, why don't you simply NOT enter a Chart Title within "Chart Options". Instead, stretch your chart to fill the entire area of the chart object, and then position the chart so that it's centered below a TITLE in a cell in the worksheet. For the TITLE in the worksheet, you should center it using: Format Cells - Alignment - Text alignment Horizontal - "Center Across Selection".
I'm always a proponent of the "easiest" (and effective) solution, and this appears to qualify. I hope it qualifies in your case.
Regards, ...Dale Watson dwatson@bsi.gov.mb.ca