change column name when exporting datagridview to excel in c #

I have a datagridview that I fill by a query, the query returns values with alias, itm and I rename it as a product when exporting it, but when filling my excel it grabs the aliases of the query instead of the names of the datagridview column. a way to rename them when exporting?

code:

private void btnExportExcel_Click(object sender, EventArgs e)
    {
        ExportarExcel(dataGridView1);
    }

    public void ExportarExcel(DataGridView tabla)
    {
        Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
        excel.Application.Workbooks.Add(true);
        int IndiceColumna = 0;

        foreach (DataGridViewColumn col in tabla.Columns) //Columnas
        {
            IndiceColumna++;
            excel.Cells[1, IndiceColumna] = col.Name;
        }

        int IndiceFila = 0;
        foreach (DataGridViewRow row in tabla.Rows) //Filas
        {
            IndiceFila++;
            IndiceColumna = 0;
            foreach (DataGridViewColumn col in tabla.Columns)
            {
                IndiceColumna++;
                excel.Cells[IndiceFila + 1, IndiceColumna] = row.Cells[col.Name].Value;
            }
        }
        excel.Visible =true;
    }

How I rename my query data to fill in the datagridview

if (Datos.Rows.Count > 0)
        {
            dataGridView1.DataSource = Datos;

            dataGridView1.Columns[0].Width = 80;
            dataGridView1.Columns[0].HeaderText = "Localidad";

            dataGridView1.Columns[1].Width = 120;
            dataGridView1.Columns[1].HeaderText = "Producto";


            dataGridView1.Columns[2].Width = 80;
            dataGridView1.Columns[2].HeaderText = "Cantidad Cargada";